Many years ago, my mom, a stellar bookkeeper, taught me how to reconcile my cheque book against my bank statement. I made it a monthly habit and it stuck. I do it to this day. Of course, I now have a collection of cheque books. They came in handy when I was audited one year and was able to provide more detail on some of the deposits. But I only save about 7 years of tax info, so likely time to recycle many of these transaction records.