Most Copilot advice oversells. This kit tells you the truth: the prompts that work, the mistakes that waste your time, and the moments to close Copilot and do it yourself.
One payment, no subscription, updates included. Equipping a team? Email me and I will quote it on one invoice.
“Battle-tested in production environments.”
The first answers were generic, a citation was wrong, and the tool stayed open in a tab you never clicked. That is not your fault. Most guidance is a list of impressive-sounding prompts with no mention of when they fail, so people try once, get a mediocre result, and tune out.
The missing piece was never more prompts. It is knowing which ones actually work, how to ground them in your own files, and how to tell when the answer cannot be trusted.
You learn one repeatable loop, the handful of prompts that work in each app, and the failure modes to watch for. You get a real win in your first ten minutes, and within two weeks you know exactly when Copilot earns its keep and when it does not.
No magic. Just a clear method and honest guidance from someone who deploys this every day.
Five durable Foundations cards plus nine app cards. Each gives you when to use it, what to skip it for, the three prompts that work, the three mistakes to avoid, and a one-line “Remember.”
A single-page system cheat sheet you can tape to the wall: the loop, the prompt structure, the one rule, and the three risks. Everything that matters, on one page.
Download it freeAround 33 pages, built to read in half an hour and put to work the same day.
Before, the cold-prompt user
You type “summarise this” into a blank box and hope. The answer is vague, you cannot tell where it came from, and a name or figure is subtly wrong. You spend more time second-guessing it than the task would have taken, so eventually you stop opening it.
After, the grounded-and-verifies user
You point Copilot at the right files, ask with a goal and a format in mind, and read the result against its sources before you use it. You get a usable first draft in minutes, you catch the one line that is off, and you decide what ships. You also know the tasks where you skip Copilot entirely.
Every app card has a “skip it for” section and three mistakes to avoid. There is a whole card and a whole guide chapter on when not to use Copilot. That honesty is the point: it is what earns your trust on the parts that do work.
It is also independent. The author has no Microsoft licence to sell you, just a practitioner read on what is worth your time. Microsoft is cited only as a neutral source. The aim is your results, not anyone's product.
The kit
$39
1 seat, one payment, no subscription
The full guide and all 14 cards. Everything you need to get genuinely good, and the parts that tell you when to close Copilot instead.
More than one person
Email me and I will quote it
Team licensing is priced per rollout rather than off a table, because five people in one department and fifty across four countries are not the same job. One invoice, every seat gets the full kit.
mathieu@kesslernity.comNot ready to buy? Take the free Copilot on One Page cheat sheet first.
Yes. It is current as of June 2026 and reflects how Copilot actually works across the M365 apps today. Updates are included, and they arrive in the same Gumroad library you bought it from, at no extra cost.
It is for anyone with a Microsoft 365 Copilot licence who wants to be good at it quickly: PMs, finance, ops, HR, executive assistants, managers, and consultants. It is not a guide for IT admins deploying Copilot, or for executives evaluating whether to buy it. It is for the people using it day to day.
One purchase covers one person. There is no tier to choose and nothing is held back behind a higher price. If you need it for a team, email mathieu@kesslernity.com and I will quote the rollout on a single invoice rather than making you buy the same kit several times.
The kit is sold through Gumroad, so Gumroad's refund terms apply at checkout. If it is not useful to you, follow the refund process there.
No. The author is an independent practitioner, not a Microsoft employee, partner, or reseller, who deploys Microsoft 365 Copilot inside a 17,000-person engineering enterprise and maintains open libraries of Copilot prompts and agents used by thousands of practitioners. Microsoft is cited only as a neutral source. Current as of June 2026; not affiliated with Microsoft.
Most buyers expense it. Your receipt email carries a Generate link that opens an invoice generator: add your billing address, put your legal company name and any reference your finance team needs in the Additional notes box, and download the PDF. If you have an EU VAT number, enter it at checkout and no VAT is charged. Here is the approval email, so you do not have to write one.
Subject: Approval request: The Honest M365 Copilot Kit ($39, one-time) Hi [Manager], I would like to expense a one-time $39 purchase: The Honest M365 Copilot Kit by Kesslernity. What it is: Get genuinely good at Copilot, fast, and know when not to trust it. What we get: - A card per Copilot surface: what it is for, what to skip it for - The close-Copilot rule: the situations where the right move is not to use it - Prompt shapes that work, with the failure mode each one prevents Why it is worth it: it is a one-time purchase with future updates included, and it costs less than an hour of any consultant we would otherwise ask. The author publishes the open-source Copilot prompt library that Microsoft's CMO for AI at Work cited as "battle-tested in production environments". A downloadable invoice is available from the purchase receipt for expenses. [Your name]
Honest, practical, and built by someone who does this every day.
Get the kit, from $39Or download the free one-page cheat sheet and start there. Questions? Contact us