Parchment paper. This is just me being super lazy – don’t judge.
Most of my recipes are messy enough and it’s a pain in the neck to clean up after them – using parchment paper is one way to avoid having to wash your baking sheets. Just put a sheet of it on your baking sheet and put the dough on top. When you’re done, just crumple up the parchment paper and throw it out.
One less thing to clean! Plus, I’ve found that it’s actually easier to get cookies and pastries off of the paper than it is to get them off of the actual cookie sheet material.