To maximize long term return the best strategy is to take your chances with the bets with the lowest house edge. The long term cost of hedging your bets will be much more than the benefit they provide. If you are still too risk averse to avoid hedging then I would suggest taking your money to the change machine where you will have no risk at all. There is no system that can beat a game of pure chance. There are plenty of charlatans promising systems that can beat games of luck like roulette, craps, and even the lottery.
Most systems trade a lot of small wins for a few huge losses.
In the long run it is impossible to beat the house at games of chance only. It pays to shop around for the best possible playing conditions. In many games, especially blackjack and video poker rules can vary from one casino to another and one state to another. Know what rules are favorable to the player and to seek them out. Avoid the side bets and gimmicks.