One method for handicapping with multiple sources of picks is to use the Consensus System.  You tabulate the future games and then let each source "vote" on its picks, selecting only the most commonly voted picks for your wagers.  I wrote a computer program that simulates 100 NFL seasons done that way, and it shows that the sources combined produce better predictive success rates than the sources themselves have.  You can actually double your profits with 3 sources and the consensus system.  But be forewarned, it also works in reverse. 

 If theinput sources are below 50% successful, then just like a room full of stooges, they will select even worse picks collectively than individually.  So be careful and use the consensus system wisely.  

More information available to you is an article in more detail, an audio show on the topic, and the program that proves Consensus works available for download if you care to run it.  These resources are available on my site, www.freedomodds.com.  Good luck, and remember always wager responsibly.  

 Inventor