The more finely detailed logs you keep, the better. Its a lot of work. But if ever audited it will "literally" save your butt. When dealing with the IRS there's three golden rules that matter.
1) you are GUILTY until proven innocent.
2) The burden of proof is on the accused (that would be you!) and not the accuser.
3) If it's not in writing, then it flat out *did* *not* *occur*.
