My husband loves to make spreadsheets. I really don't. But I do like making lists, particularly if we're going somewhere. Two weekends ago, we went camping (a great frugal way to take a vacation). We noted that we make the same list every year but forget at least a few things.
This year, we came home, didn't throw away the list, but added a few things we'd forgotten. Then we made a spreadsheet and saved it on the computer. What a great way to save time next year!