ha- here's where a little OCD s a good thing. I have 3 excel spreadsheets: one lists all the sets and all the people I'm helping and which ones they need by number n the set (1st, 2nd etc). when the set's full I shaded the square (makes it look like I'm getting somewhere. The 2nd sheet is what I have of eat set to gift what's extra to trade and what I need. and the 3rd page is the days of the week and the people and what I'm sending each day. . .and (scary but true) I now don't usually have to look up which page it's on or which # in the set when I get a collectible gift- I just know!