VELOR · EDITION 03

100items

ChatGPT Field Guide to Mastering ChatGPT

The ChatGPT guide is VELOR's free AI education resource: 100 practical items on using ChatGPT at work, written for seniors and mid-career professionals. One hundred items for putting ChatGPT to work, across ten domains — setup, model choice, prompting, custom instructions, projects, GPTs, and data analysis. A person stays accountable for every output.

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Document

DocumentAI-CHATGPT

ClassFree · Team

Sections10

Items100

Current modelsGPT-5.5

As of2026.06

CONTENTS / 목차

01 Getting Started 001–010 02 Pick the Right Model 011–020 03 Prompting 021–030 04 Custom Instructions & Memory 031–040 05 Projects 041–050 06 GPTs 051–060 07 Data Analysis 061–070 08 Multimodal 071–080 09 Search & Connections 081–090 10 Safe Use & Governance 091–100

Getting Started

Start on web and app with an account.

001

Create an account at chatgpt.com and start chatting.

002

Install the mobile app to use voice as well.

003

Ask comfortably in Korean; request a simpler version if needed.

004

Chats save automatically, so you can continue later.

005

Start a 'new chat' for a new topic to keep context clean.

006

Zoom the browser if the text is too small.

007

Don't enter sensitive personal information.

008

Start free; upgrade when you need the stronger model or features.

009

Copy answers into email or docs to use right away.

010

Regenerate with 'again' or 'differently' if unsatisfied.

Pick the Right Model

Match the model to the task.

011

For complex analysis or planning, choose the most capable GPT-5.5.

012

For simple questions, the default faster model is enough.

013

Switch models by tapping the model name at the top.

014

If shallow, switch up to GPT-5.5 and retry.

015

Default to GPT-5.5 when numbers, logic, or rules matter.

016

Use the default for quick drafts and GPT-5.5 for the final.

017

For reasoning, ask it to 'think step by step.'

018

Switching models keeps the conversation context.

019

Ask which model you're using if you're not sure.

020

Verify the answer once more before an important decision.

Prompting

Give context, format, and an example for better answers.

021

State 'what, for whom, in what format' in one line.

022

Share your context (field, experience, goal) first.

023

Specify output like a table, an email, or a 5-line summary.

024

Attach one example of the result you want.

025

Ask one step at a time and build on each result.

026

If long, ask to 'cut it to the 3 key points.'

027

For tough jargon, ask it to 'put it simply.'

028

Set the tone, e.g., 'polite,' 'concise.'

029

Correct errors instantly with 'fix this part.'

030

Save prompts that work and reuse them.

Custom Instructions & Memory

Tell it about you once; it applies that every time.

031

In custom instructions, set your role, tone, and length.

032

Lock defaults like 'always Korean, polite, as a table.'

033

Memory remembers what you told it and reuses it later.

034

Review and delete wrong memories in settings.

035

Split into projects when each needs different instructions.

036

Add company rules and banned terms to reduce mistakes.

037

Be careful not to leave sensitive info in memory.

038

Keep instructions short and essential so they're followed.

039

Tune the instructions if the answer style drifts.

040

Saves time especially on repetitive advisory or teaching work.

Projects

Keep related chats and files in one place.

041

A project is a folder for one topic's chats and files.

042

Create a project per job, e.g., 'TIPS evaluation advisory.'

043

Upload recurring files so you don't re-upload them each time.

044

Inside a project, chats keep remembering those files.

045

Set per-project instructions for tone and rules.

046

Archive finished work as a project to find it later.

047

Add new chats inside it as topics grow.

048

Separate multiple clients or tasks so they don't mix.

049

Export just the results when you need to share.

050

Check access and retention policy for sensitive projects.

GPTs

Build a purpose-built assistant to reuse.

051

A GPT is your assistant with a preset role, rules, and files.

052

Build it for one purpose, like a 'proposal reviewer.'

053

Set it up by chatting — no coding required.

054

Attach templates and files to lock in quality.

055

Call your GPT with one tap from the list.

056

Browse public GPTs and grab one that fits.

057

Refine the instructions to make it smarter over time.

058

Add sample answers to show the output you want.

059

Share it with your team to work to one standard.

060

Especially useful for experts with repetitive reviews.

Data Analysis

Upload files to analyze into tables and charts.

061

Upload Excel or CSV and ask for 'a summary and charts.'

062

Ask in words, e.g., 'plot the monthly sales trend.'

063

Download the result tables or charts as an image or file.

064

Get averages, totals, and growth rates without formulas.

065

Ask it to find outliers and missing values.

066

Ask how it calculated, so you can see the basis.

067

Merge multiple files for a comparison.

068

Ask it to turn the results into report sentences.

069

Cross-check the figures against the original once more.

070

Mask or anonymize sensitive data before uploading.

Multimodal

Understand photos, create images, and talk by voice.

071

Upload a photo and ask what it is and how to use it.

072

Turn document or receipt photos into a table.

073

Photograph foreign text to translate and summarize it.

074

Describe and generate images for slides or promotion.

075

Convert handwriting or print to digital text.

076

Use voice mode to talk when your hands are busy.

077

Upload a chart image to get the key points explained.

078

Check rights and use before using a generated image.

079

Get descriptions or ad copy from a product photo.

080

Listen by voice to rest your eyes.

Search & Connections

Find current info and connect apps and files.

081

Have it search the web for up-to-date answers.

082

Open the cited links to verify the facts.

083

Specify 'as of today' to demand recency.

084

Use search for fast-changing prices, news, and schedules.

085

Connect apps so it answers from your own data.

086

Enable connections only when needed, then disable them.

087

Cross-check search results; don't over-trust them.

088

Ask it to 'confirm with another source' if it's weak.

089

Get the research compiled into a report format.

090

Check the sharing scope before connecting sensitive data.

Safe Use & Governance

A human checks and stays accountable.

091

AI output is a draft; the person stays accountable.

092

Re-verify numbers, dates, and rules at the source.

093

Always read for plausible-but-wrong answers (hallucinations).

094

Pause again before entering client or company secrets.

095

Never enter IDs, accounts, or personal data.

096

Release important documents only after a human review.

097

Don't cite claims without a clear source.

098

Confirm medical, legal, or tax matters with a professional.

099

Use within company policy and the terms of service.

100

AI saves time but never replaces your expertise.

Korean Resources

Weekly

Curated Korean creators, well-known sites, and official docs — with sources. Read the originals at each link.

001

OpenAI · 공식 도움말 · 한국어

ChatGPT 프롬프트 엔지니어링 모범 사례

OpenAI's official guide to writing effective ChatGPT prompts.

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002

김덕환 · log8.kr·2026

ChatGPT 맞춤형 지침(Custom Instructions) 2026 가이드

Copy-paste templates and persona-based custom-instruction setups.

A comprehensive ChatGPT usage doc on Korea's largest wiki (user-edited; reference only).

↗

All listed materials remain the copyright of their authors and publishers. This page links to sources with attribution and does not reproduce their content.

FAQ

QWhat is ChatGPT best at?

Broad everyday and work use — writing, organizing ideas, translation, and learning. The most general-purpose tool.

QCan I start ChatGPT for free?

Yes, start free; consider a paid plan if you need faster models. The guide prioritizes free-tier use.

QWhat should a senior try first with ChatGPT?

Start by asking, in plain language, to 'summarize this simply.' The 100 items organize practical use.

QAre ChatGPT and OpenAI the same thing?

Yes. ChatGPT is the conversational AI service made by OpenAI. This guide draws on OpenAI's own materials, reframed for practical use by seniors and mid-career professionals.

QCan I keep using ChatGPT for free?

Yes — a free account covers ongoing everyday use; consider a paid plan only if you need faster responses or the newest model. This guide starts within the free tier.

VELOR insights · career hub

Content connecting AI skills to senior careers.

Senior careers in the AI eraInsights on AI-era reskilling, side income, and learning for seniors. velor.kr/insights Senior jobs guideA step-by-step guide to senior jobs and reskilling. velor.kr/시니어-일자리-가이드

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