At the risk of sounding like your mom, eat your veggies and salads. I know everyone likes to post their latest bacon wrapped yummy delight on this site. That makes for good food porn but you need to balance out all that bacon with enough fiber to keep things moving.
About the zit issue. When your body is overwhelmed with toxic stuff like artificial sweeteners, chemicals, etc. it can't keep up with processing them all out so, as a self defense mechanism, it encapsulates the toxins in fat and stores them away to get around to dealing with them later. Well, when you first go primal, you are giving your body such a break from all that toxicity that the stored toxins start to come out. Most goes out through the urine but some also comes out of the pores causing zits. Next time you get a zit don't think of it as an ugly thing spoiling your handsome face. Think, "Cool. There are some more of those nasty toxins leaving my body."