There are countless theories about how to beat the NFL betting lines. The trick is to differentiate good theories from the bad theories in NFL betting.
NFL betting theories come from a variety of sources. Unfortunately, there is a considerable amount of opinion in NFL betting and a surprisingly small amount of original thought. It won't take long for you to understand and pick up on the same tired old theories that have been kicked around for ages as you bet football. By studying the various theories, regardless of sport, you will develop a sense for what is just more crap from something that is actually worthwhile in NFL betting. While you are looking for theories that are unique you don't want theories that are so abstract and “out there” that they actually make little real sense or have any relevance in NFL betting.
For example, a theory that sounds something to the affect of “take any AFC West team versus any NFC Central team if the AFC team scored 14 points or less in their previous game while the NFC team is coming off an intra-divisional rivalry loss and allowed 35 or more points. Such theories may sound good and may even have a high percentage, but they are also more coincidental than relevant when you go into action as you bet football.
Admittedly, it can be a fine line between theories that are tired and typical and theories that are unique and yet still relevant in NFL betting. The best way to learn is through constant study. It is often more valuable to study actual gambling theories rather than sports handicapping theories in NFL betting. Any theories that are from an oddsmaker's perspective should be at the top of your list for consideration and usage in NFL betting. You must remember as you bet football that the oddsmakers know what they are doing. If you can find a theory that is based more on the odds than on past trends you may have found something that is worth considering in NFL betting.