Don't bet what you cannot afford to lose - This is generally known as the golden rule of sports betting and is a thing you absolutely do not want to do because you'll hit a cold streak eventually and lose all your rent money.
Use proper bankroll management - It is quite important to use proper bankroll management because betting sports can be very streaky. Even professional bettors can lose 9 or 10 games in a row and when you are betting too much per game you go bust. Think of your bankroll like your child and do whatever you have to protect it.
Do not bet too many games - You know when Sunday comes and there is 15 NFL games you don't have to bet them all, you only want to bet the games you've got an edge on and most successful bettors will only be able to find 2 or 3 games that they have an advantage on.
Line Shopping - This is something that takes almost no effort and it makes a large difference. If you like the Packers and most sports books have them listed as a -7 favourite but one sports book has them listed at just -6.5 you will be crazy not to bet the -6.5. By the end of the season it shall probably make the difference from being a winner or loser. Every sports bettor should have at least 3-5 outs.
Bet with your head not your heart - Most individuals love betting their favourite teams because they have an obvious bias towards them and want them to win. Wanting a team to win is unique then thinking a team will win. It's best for some bettors to just skip right over games involving their favourite teams because they cannot separate heart from using your head.
Do not bet big parlays - This goes for a whole lot of the exotic type bets like futures, teasers and parlays. 10 or 12 game parlays don't hit oftentimes, they can be 100% gambling and we are not here to gamble if you want to gamble buy a lottery ticket because there's no difference.
Do not bet drunk - There are a lot of things you don't want to do drunk and betting is just one of them in case you are not 100% in control of your emotions you want to stay very far away from the sports book because the same as banging a fat chick you will wake up disappointed.
Do not pay for picks from touts promoting a 70% win rate - If it sounds too good to be true it probably is so if you are going to use going to utilize a tout and pay for picks use common sense. No-one can pick 70% winners even the very best handicappers only hit 58% or
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Keep good records - This is an issue that almost nobody does and I am even guilty of this sometimes. You want to keep very meticulous records. The better you keep track of you can look back and see where your losing or winning the most money and after that possess the prop data to make changes.
Play at reputable sports books - If you play online you want to be absolutely certain you get paid if you win. There are dozens of reputable sports books online so do some study and avoid the scam books because there could be nothing worse than winning and then not being able to get paid.