I didn't give a very helpful answer, and it's fun to read what's in everyone else's spreadsheets, so here's what's in mine:
That's just the first tab in my spreadsheet, for my US notes. I have other tabs for tracking my Confederate notes, world notes, and quasi-notaphilic material (Giori test notes, a WWII ration book, my first tax refund check, etc.). Number (according to the way my notes are physically ordered, which is generally by Category [see below], Size, Type, Denomination, and Series) Friedberg number Denomination Series Type Serial number TPGS if any TPGS cert # if any Grade Categories: Variety Fancy Serial Number Error Courtesy Autograph Sheet A few others Type Note (catch-all category) Date added Comments Source Cost I also have tabs for tracking my progress for different sets, showing what I have and what I need: courtesy autographs, Japanese invasion money, $2 district sets, wide/narrow varieties, Nationals (sigh - long way to go on that one). The last tab is the least fun - it's where I keep track of how much money I've spent.
Florida and Washington state Nationals; engraving errors and varieties; courtesy autographs