@"Alex Divine" yeah I can't stress enough the importance of food. It's literally your body's fuel. I think you can get away with it when you are young (oh the stuff I put my body through in my early 20s :)), but it catches up with you eventually
You can begin from PT 1, but if you're food proofing games by game type then you have to go out of order. I personally think that fool proofing by game type is better, but doing it by PT can help too.