It’s the small things that make all of the difference.
When I started my own firm, one of the things I was very bad at was keeping track of my mileage. Come tax time, my accountant would ask for my mileage log. I would then look back at my calendar, open google maps, and calculate mileage based on what was in my calendar. Things like trips to get supplies or to the bank never made my spreadsheet.
As of March 30, 2016, the current IRS mileage rate is $.54. That adds up quickly.