Play over on a team that was a minimum of -6 games or worse ATS in the preceding year. Example: Baltimore was 3-13 ATS in 2007 thus making them an over 6 wins play for the2008 season. They won 11 games that year. Playing on teams that were -6 or worse ATS the year before, has produced a 8-2 record over the past 4 years.
Play under on a team that was a minimum of +6 games or more ATS in the preceding year. Example: Atlanta was 11-5 ATS in 2010 thus making them an under 10.5 wins play for 2011. They won 9 games last year. Playing against teams that were +6 ATS or better the year before, has a produced a 8-5 record over the past 4 years.
Many of these 23 plays were even to plus money. While there is no guarantee that this trend will continue, it might be something to keep an eye one.
2008 7-1
2009 3-3
2010 3-2
2011 3-1
Plays this year:
New Orleans under 10 (12-4 ATS 2011)
San Francisco under 10 (12-3-1 ATS 2011)
St. Louis over 6 (3-12-1 ATS 2011)
Tampa Bay over 6 (4-12 ATS 2011)
Green Bay under 12 (11-5 ATS 2011)
These are generic numbers. Better numbers with better odds for the diligent shopper are available. It is worth the effort to get the best number possible as many plays come down to a one game difference or even a half a game difference.
Good Luck.