Don't scrimp on your baking sheets/pans. Personally, I LOVE
Airbake cookie sheets and I have a couple of really nice, non stick baking pans. Then only use those pans for your baking.
Parchment paper is a MUST have. It's great for cookies because they cook evenly, come right off the sheet and leave your cookie sheet looking like new!
Don't forget the cooling racks either. I didn't have them for years and never knew what I was missing!! Definitely makes things better/easier.
Good luck with your baking!!!