Focus on Underdogs
ProLine odds tend to be biased towards the favourites (the public LOVES winning games and ignores the odds) – Going the other way has value.
Look for Correlated Parlays
For example, MLB home winners tend to correlate/go UNDER the total (there is rarely a bottom of the 9th because its not needed because the home team is winning). Parlaying home & under is a strong play. In fact, Pinnacle Sports, a leading online book, recently banned these wagers after a couple profitable seasons.
Check for line changes
ProLines odds are static; they do not move. Real lines move based on betting action, injuries, weather, and other factors that ensure updated lines are more efficient and correct then opening lines. Checkout my DonBest lines for the sport you are betting and compare to the opening line – big line movements could mean hidden value.