INSANITY Tips and Help

I just started INSANITY on Sunday (I will finish Day 6 today). I am curious what tips and suggestions people have to get max. results and what type of success you had.

1) Calorie intake - I seem to be getting mixed reviews. I felt like the suggested number with the meal plan was a bit high, but hear that is actually helpful? MFP is recommending closer to 1600 for me...

2) Suggested foods?

3) Additional exercise in addition to INSANITY?

4) what works best??

Thanks!!