I know a lot of people already do this, but I'm always surprised by how many people have no idea that you can do this, so here goes.
Using parchment paper to bake the cookies is easy, safe (and food-grade!), and is my favorite cookie-baking trick.
Parchment paper allows you to be more precise in baking cookies, because you can remove them all from the pan at the same moment. Plus, you can make more cookies faster, which is never a bad thing.
A note: Some people use brown paper, but parchment has a longer life, so I prefer it over paper.
Step 1: What to do
All you need to do is cut some parchment paper that will fit on the cookie sheet you're using. Put the dough on the parchment like you normally would. The difference here comes when you pull it out of the oven. Wait until the cookies are exactly the texture/color/whatever that you want. Pull the pan out of the oven, and slip the parchment paper with the cookies on it onto a dry surface.