Recently started using mail merge.
Combined it with some vba scripting(didn’t learn it well, just found some scripts on the net and modified them a bit) so that I could get pdf files for emailing by clicking a macro button from an excel sheet.

Also, go to use the info about the keyboard mouse right click button when someone’s Right Mouse Button was not working. https://www.online-tech-tips.com/wp-content/uploads/2020/04/Windows-Right-Click-Button.jpg

I mentioned only computer things because of recency, but please do share your experiences in other topics too.