*This isn't a must do, but I find that if the dough is cold, the cookies won't spread too much when baked. We are going for "soft & chewy" not "thin & crispy" after all. I often leave mine in the fridge overnight.
**I typically use a medium sized cookie scoop, which is about a tablespoon, but have used the large one as well. I get 12 cookies per sheet with the medium scoop and 8 with the large one.