Ever since I realised that corporations are allowed to engage in fraud, and a litany of other crimes, without consequence I started archiving things directly using a combination of the SingleFile browser extension and full page screenshots, placing them in a web-archive folder.

Every time I purchase anything I save the product listing and order page, along with all associated info, naming all files based on the date of the purchase; the larger the purchase the more I’ll save (product page, warranty, user manuals, etc), and sometimes even a note.md file to document specifics (filter changes, spare parts and part numbers, etc).

I also use this method to snapshot various account pages or interactions like web chat; pretty much anything that future me could possibly need to reference.

It comes in handy extremely often.