Does anyone keep a gambling log?

[oldslotguy]

Oh, I also have in my log where the start $s came from, as in ATM/bank/CU/saving/checking/, and save the slips/and check book logs.

Have' free' play, comps on a separate log. Someday the IRS may get the idea that they're missing their chance on taxing 'free' play, comp $s, rooms , etc.
They make a big difference in your win/losses when added to 'wins'.