Started using daily planners when a friend didn't and got fined big time from IRS for not keeping track of his milage. Like most of us that use trucks or cars for work, write the milage done on Jan. 1 and then on December 31. IRS wants daily tracking with all stops or work site indicated, so every morning before I take off to the job, milage written down and work site location.... Come on IRS I'm ready....