.... to each his own. For me I simply keep the receipts in a folder and when time is available I quickly list them in my excel spreadsheet. This keeps is by date and where it came from with the part # and cost. I DO refer back to it often and its easier than digging through a pile of receipts which, I might add, I usually punch a holes in them and place them in a big notebook. I'm driving a restoration/modification I did 10 years ago and it helps immensely.
I might also add that if one sells a vehicle the new owner will more than appreciate the list of part #'s and where stuff came from. It just makes good sense.
Elaborate, heck NO, just a few minutes here and there. The KEY is to not let it pile up and get discouraged. It usually only takes less than 10 minutes for me to put the receipts in a book and list on the excel spread sheet. Plain, simple and cost effective.
