Honestly, the first thing that breaks my defenses each year isn't the market conditions, but the tax forms... My current clumsy method: from the very beginning, fix the exchange and on-chain addresses, don't switch from A today to B tomorrow; record every deposit/withdrawal as a line "source - destination - time - chain," and conveniently take a screenshot to save in the cloud, so I don't have to worry about mismatched accounts or doubting myself at the end of the year.

For the on-chain part, I just save the frequently used addresses as browser bookmarks in the same browser, and if possible, add some human-readable notes to transfer remarks.

Recently, the NFT royalty disputes are quite similar to tax issues: everyone wants to pay less / get more, but in the end, it still comes down to records speaking for themselves.
Anyway, my goal isn't high; I don't want to start retroactively tracking only on the filing day, that would really drive me crazy.
I'm not sure what the most perfect method is, but at least now, going back through old accounts isn't as painful.