This is called line shopping and is an integral part of sports betting, especially with moneyline bets. Most good sports bettors will have accounts on lots of different sportsbooks so they can check the lines on every bet they are making. Whichever book has the best lines for them is where they’re going to place their bet. To be honest, with how easy it is to shop lines online, the only reason you wouldn’t is if you were too lazy and didn’t care enough about your bottom line.
Only bet games where you have a clear prediction on a team covering the spread. Look for lines that you think are incorrect and put your money there. The idea here is to be making intelligent picks that you actually believe will win. If you're betting every game, you're just gambling and no longer letting your skill and knowledge base shine through.
All point spreads are set by the pool administrator. NOTE: The administrator has the power to change the point spreads at any time up until 15 minutes before the start of the first game, so make sure you know when the administrator will make the final changes. For your own information you should also find out where the administrator is getting their point spreads.
Notice that point spreads adjust the score for the favorite team. This is easiest to see with an example: If the New York Knicks are playing the Boston Celtics, and Boston is favored to win by a 4-point spread, then a bet on Boston only pays out if Boston wins by more than 4 points. A bet on New York pays out if New York wins or if they lose by less than 4 points.
You may have heard the term “covering the spread” or the phrase “betting against the spread.” This means that if the favorite team wins an event with the point spread taken into account or that the underdog team wins with additional points, they have covered the spread. If the Packers win that game by more than 7 points, they have covered the spread.