@VRH, re: receipts.
I got into the habit of keeping a small pocket log book of the miles I traveled for work, keeping the receipts for everything (and I mean *Everything*) work related, & making sure to claim such expenses on my taxes.
It didn't matter if the business refunded me for such expenses, the Tax Man rarely did *not*.
Tax Man: "This is a log of what? The mileage incurred for work? Ok, thank you... hummmm... Approved. And these are the receipts for food, lodging, business clothes, and all the expenses incurred in working? Hmmmm... Ok, this one- oh wait, that's acceptable... Ok, Allowed. Thank you, let me just add up your refund..."
I'd get a nice fat cheque at the end of the year to make up for all the bullshit I'd gone through for my employer, & the revenue service would then stick it to my employer for "all these expenses you're costing your employees".
I'll second your suggestion to keep receipts, but I'll expand it to include a mileage & fuel log for the car, keep the receipts for business clothes (especially safety shoes/gloves/goggles), & any/all plane/train trips you have to take. Unless the employer pays for it up front (buys the plane/train tickets) then *all* of it can come off your taxes, and *THAT* will make you quite a happy camper when the refund cheque gets deposited into your bank.