Step-by-step guides for the software and systems people actually use at work.
A column called Amount usually includes refunds as negatives. AI assumes it means revenue received, produces arithmetically perfect output describing something else, and nothing flags the difference.
A cleanup applied to five thousand rows in one pass is also a mistake applied to five thousand rows in one pass. Which cleanups you can undo, which destroy the original, and the workflow that keeps everything recoverable.
Generating the formula is the easy part. A range that starts one row too low produces a plausible wrong number that nobody notices for a quarter. Here is how to ask well, and the four-minute check that catches it.
Microsoft’s documentation states the Excel COPILOT function stops being available on 14 September 2026, and the web rollout was cancelled. If you built anything on it, this is a deadline rather than a heads-up.
Most people who pay for Copilot in Excel cannot use it on the first attempt, and it is rarely a licensing fault. Microsoft documents several conditions that must be true first, and none appear on the purchase page.
Make a chart in Google Sheets and choose the right chart type for the data, rather than accepting whatever Sheets automatically suggests by default.
Add a signature in Gmail and set it as the default for both new emails and replies, avoiding the most common setup mistake people genuinely run into.
Convert a Google Doc to PDF using the built-in Download option, and avoid the most common formatting, comment, and image issues along the way.
Use Google Drive to store, organize, and share files, and understand the real difference between My Drive, Shared with me, and Shared drives.
Use Google Sheets effectively, from automatic saving and formulas to real-time collaboration and recovering mistakes with version history at any point.