Pointless running.

If you notice that it's pouring rain outside, but you need to go get your laundry from the laundromat, don't attempt to sprint there. It won't help you stay dry. In fact, while running you will step in a massive puddle and soak the bottom of your sweats. And someone will be standing by the laundromat watching you the entire time.

If you are with a boy you like who is talking in Spanish on the phone and he asks you if you know the language, say no. Or else he will say "I'll talk to you later" in Spanish then hang up with the person he's talking to.

When carving pumpkins with some friends don't mention how you eat pumpkin seeds because you will feel dumb when you find out you have been eating the shell of the pumpkin seed your entire life and didn't know it.

If you just barely put a mint in your mouth, make sure nothing gets you excited because you will swallow that mint before you can even enjoy it.