I made a detailed spreadsheet a while ago to keep track of my Bookie profits. I've made it public if anybody would like to use it.
Complete columns A, B, C, D, E, F and H.
If you see any errors or improvements please let me know.
Bookie Spreadsheet
Just remember that if you don't input your losses it's not worth tracking at all. So ensure you keep it updated as much as possible or else the data isn't worth much.