I'm not going to bore you with all the complexities within money management as there are thousands of references online that go into detail of all the various aspects pertaining to this subject although it is just as; if not more, important than actually picking winners. Suffice it to say, my belief is never wager more than 3% of your total bankroll on any 1 play.
You must have a bankroll used strictly for your betting. Do not use money that could be used to pay bills, rent, etc. for betting.
Use a flat betting strategy only and make your wager amounts proportionate to your current bankroll on every play except as noted below.
On the days where you have more than 3 plays, cut your wager amount to 40-50% of your normal wager amount. This will prevent a bad day from really impacting your bankroll.
You'll never see 5 star specials, locks of the month, plays of the year or any other garbage like that on this site. My return on investment (ROI) is based on the amount I bet then simply dividing money won or lost by number of games played in each sport. The amount I bet depends on my total bankroll. Unless otherwise specified, plays are based on 1 unit which equates to the standard $110 for most football or basketball spreads or totals.
A couple more things you won't see on this site are: (1) any game that is priced at -150 or higher because I don't believe it's a good idea to lay that high a price on any outcome and (2) NFL double digit favorites because the league is far too competitive.