The NFL has become almost impossible to play on a weekly basis. I gave up last year and don't miss it a single bit. I still love watching, just not betting.
IMO there are only two good systems:
1) If it looks too good to be true, it probably is.
2) If pezz picks it, go the other way.
Even though they lost, the Chiefs looked pretty good last night. I can't wait for the rematch in Arrowhead.