I use Quicken  to write checks and categorize expenses. So this time of year, I print the 12 month register and forward to my accountant.  All of my expenses are automatically categorized and as each check is written Quicken calculates the balance. 

Prior to Quicken, I would get all of my cancelled checks and put them on the floor, make piles and total the piles - a lot of work!  I love technology!!!!