Where does stuff walk off to??

How can I not have/find any post-its or note pads to write on?? It's driving me nuts! I am writing messages/notes on the back of envelopes and recycle papers. I distinctly remember emptying my desk drawer at the old house into a box to go to the new house (not packed in the POD) and it's nowhere to be found. I guess I could go to the store and buy more, but I know I have a ton somewhere....but maybe if I go out and buy them I'll come home and find them. That's usually how it works for me. To top it off it's raining (again) and I pulled a muscle in my shoulder at the gym last night...yep, it's one of those days!