Let's say you're on a road trip. You're in the backseat heading to your grandparents house. You have a receipt or a scrap of paper or maybe even a napkin! And a pen. You love anime? Then learn how to draw some thing you're truly satisfied with so you don't waste so much paper!
Step 1: Find Random Stuff
Look around. Find something like a receipt, napkin, sticker sheet without stickers, etc. Basically something paper. And dig around for a pen.