Pencils. Ditto for pencils. But why are you using pencils!?!?!? Sharpening it for the bubbles on the SAT?!?!? (Actually I have no idea if this is how the SAT works. I totally forget.)
Umbrellas. There's always an umbrella lurking in the back of a closet, or behind a door, or in the backseat of a car. Until there ISN'T. Then you have to BUY one. And if you buy a cheap one it will break, and if you buy an expensive one you will leave it somewhere.
Underwear. You think underwear just grows on trees? I wish it DID.
Safety Pins. Ohhhh safety pins just live in the backs of drawers and the bottom of little darling pointless containers you have on your shelf that your aunt gave you when you were 6. They just seem to spawn themselves in bag pockets and jars of buttons n' things. But this isn't little house on the prairie. And safety pins don't reproduce or appear like pearls. So, you have to buy them.
Ditto Bobby Pins
Ditto Hair Things
USB chords, etc. That tub labeled 'electronics' that you shoved in the top of your closet is bound to have a USB chord. Well it probably does. But you have it because you bought something and it came included. Ok this is a bad example.
Lemons. Lemons need to be bought! Take it from me. I always expect there to be lemons around and there never are
Peanut Butter. Pantries don't come stocked with PB. You have to buy it, sadly.
Electricity. You need to buy it. That is shocking to me whenever I remind myself.
Matches. Matches don't just exist waiting for you to use them. They shouldn't be taken for granted. Fire is a commodity and hard to come by in the wild unless you are in a wildfire, of course. Matches need to be bought, or stolen from those hostess tables at restaurants. I bought a candle last month in this sublet I am in and I could NOT FIND matches or a lighter in ANY junk drawer. It was eye opening.
There you have it. That is all for now.