If you can only keep one habit: record a line immediately after each transaction/transfer with "Time + Chain + Currency + Amount + Counterparty/Platform + Purpose," don't wait until the end of the month.

The biggest fear during year-end tax reporting isn't losing money, but rather not being able to piece together what you did at that time, especially with on-chain swaps, cross-chain transfers, airdrops, Gas fees, and a bunch of decimal points—ultimately relying on "I remember roughly"... and then going crazy.
Recently, the "compound yield" staking method has been causing a lot of noise; honestly, the more layers you stack, the more tangled the records become.
Don't treat your tax declaration as the last layer of risk buffer—start with this.