Keeping a computer checkbook register is a very good idea. It gives you a back of your original. And, since most people already bank online, and work on computers during the day, this will keep everything in one place for you. There is an excel checkbook register template on this webpage: http://office.microsoft.com/en-us/templates/TC010186511033.aspx . The template has a very good rating and has
. had over 1.500,000 downloads. Which means many people are using this form of keeping track of their checkbooks and they're very pleased with the results.