Actually, everyone understands that the most painful thing at the end of the year isn't losing money, but having to sift through transaction records until you start questioning your life... I've learned my lesson now; every time I transfer funds / swap coins / claim airdrops, I make it a habit to note down a line: time, chain, wallet, counterparty, tx hash, and then take a screenshot as "evidence." On-chain data tools and those tagging systems have recently been criticized for being laggy and misleading, so I don't fully trust automatic categorization. I prefer to add an extra column in my spreadsheet: "What was I actually doing at that time." Anyway, by the end of the year, you'll thank this verbose version of yourself now.