How to Train ChatGPT to Think Like You

Train Your Own GPT

by Bill Jelen

Train Your GPT is a hands-on, no-code guide to creating AI assistants that actually work the way you do. Whether you're a content creator, consultant, or spreadsheet nerd, you'll learn how to train ChatGPT to follow your style, use your files, and save you serious time — all without needing to know a single line of code.

About The Book

Tired of generic ChatGPT responses that miss the mark? Want AI that actually gets your tone, your tasks, and your workflow? This is the book for you.
In Train Your GPT, bestselling author and Excel legend Bill Jelen (a.k.a. MrExcel) takes you inside the world of Custom GPTs — the powerful, personalized AI tools you can train to write like you, work like you, and think like a trusted assistant. No coding required.
With humor, clarity, and hands-on guidance, Jelen shows how to:
• Build GPTs that follow your instructions every time
• Upload files to give your GPT real context (and a real personality)
• Analyze and improve your GPTs with feedback loops
• Integrate GPTs into Microsoft Copilot Studio and everyday apps
• Scale your content creation, automate repetitive tasks, and get more done
Plus, you’ll get real examples, behind-the-scenes conversations, and stories from the “ISPRIME incident” to the Groundhog Day dinner party — because this isn’t just another tech manual. It’s a fun, practical guide for real people using AI in real life.
Whether you're a content creator, teacher, consultant, or spreadsheet wizard, Train Your GPT will help you turn AI from a curiosity into a career-changing tool.

““If you’ve ever felt like ChatGPT was impressive but not yours — this book is your missing piece. MrExcel doesn’t just explain how to build GPTs; he shows you how to make them behave, listen, and work for you. It’s like having your own AI intern — minus the coffee breaks.”ChatGPT (yes, that ChatGPT)”

ChatGPT (yes, that ChatGPT)

“Look, I’ve indexed dozens of MrExcel’s books. I’ve seen formulas, pivot tables, even VBA macros that made my eyes twitch. But this GPT stuff? It’s different. It’s useful. And it doesn’t require aspirin. If you’ve ever wanted a tireless assistant who actually understands your instructions, this book is how you build one. Just don’t teach your GPT to do indexing. I need the work.”

Nellie Jay

Holy Macro! Books

Books on Microsoft Excel, Power Query, Power BI, ChatGPT by Excel MVPs.

Holy Macro! Books is a niche publishing company dedicated to empowering Excel users worldwide with expert-level guides on Microsoft Excel, Power Query, Power BI, and more. Founded by Excel legend Bill Jelen, the company features books authored by Microsoft MVPs, former MVPs, and top industry experts who know their way around formulas, pivot tables, and data transformations. Whether you're a beginner or a power user, Holy Macro! delivers practical, straight-to-the-point content that turns spreadsheet struggles into spreadsheet superpowers.

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