Record keeping is one of the most important tasks of a successful sports bettor.
Trying to locate your individual strengths and weaknesses as a bettor may be the best information you can discover when trying to find winning betting patterns in order to be a successful sports gambler.
To make this determination in a statistical sense, return-on-investment can be one of the most important calculations for finding profitable systems.
Simply take the profit from your wagers and divide the number by the total amount of your wagers.
Because of the nature of fixed-odds betting, often a straight winning-percentage is not the best tool for determining if your bets are profitable.
Return-on-investment can be broken down for specific types of bets, as well, that may help you determine your strengths and weaknesses in different types of NBA bets, such as point-spreads, money lines or totals.
While any betting system that shows a profit should be put into use, you should try to find those that have at least a 2.5% ROI to continue working on or refining for better use.
An ROI of 5% percent of higher on a system definitely warrants attention and should be followed thoroughly.