I'm not one to tout an NFL publication or specific analyst, but Warren Sharp's NFL Preview is pure gold. If you hope to show a profit this year in the NFL you have to get this publication. He has a multitude of charts about each team, but it's his analysis of Turnovers and EDSR that will turn the tide to profitability.
Up to now, I've relied on my own skills and intuition and thankfully have turned a profit, but these two key elements promise to kickstart my profit margin by leaps and bounds. It becomes obvious once you understand it.
It's available at amazon or pdf at his site for under $20. Best purchase I've made all year. And even if you don't bet, his team by team preview will give you a huge insight to who will fare well and who won't.
Check it out