I think MYStuff is the perfect "in-between" app, between "go paperless!" (and scan everything in) and "inventory everything you own!" (home inventory apps). I have no need to scan every scrap of paper and I don't care to inventory everything I own. MYStuff does a great job of keeping track of everything I want to keep track of without making me feel like I need to keep track of everything.
I'm knocking 1 star off because it doesn't have built-in scanning, but instead makes you use a dropbox of sorts. It works okay, but built-in scanning should be in the next revision, as should OCR. Put those in, and I think it'd be worth that coveted 5th star.