The martingale-Very popular
The martingale system is used in stock exchange as well as gambling but requires a huge bankroll,basicly it revolves around doubling your bet upon losing and returning to minimum bet upon winning.But don't think you are a genius just yet because you figured this out

this is the first of all gambler's curse,figuring out this genius looking plan but you find out it is very not so genius lol...
bet pattern: 1$(if lose) bet 2$(if lose) bet4$(if win) bet 1$ etc..doubling your bet upon losing and returning to minimum bet upon winning
Anti martingale or reverse martingale
Requires a less giant bankroll because you only go with winning streaks,basicly you bet the same until you win and when you win you bet more and when you eventually lose you go back to the minimum u started with.
Personally I hate this one.
bet pattern: 1$(win) you bet 2$(win) you bet 4$(win) you bet 8$(lose) you bet 1$ etc..
Flat betting-most popular
The slow road to your inevitable doom since the house wins more often than you will,all you can hope for is a jackpot and this should only be applied to slots or progressive jackpots.The problem is that every single casino game is rigged to make you lose more often than you win so not varying your bets is guaranteed downhill.
bet pattern:1$(win or lose) 1$,1$ etc...
Going with the flow-least popular but my favourite hehe
So you start with the minimum bet and work your way to a pre determined point like 10$ for example.Basicly you start with the minimum bet for example 1$ then 2$ win or lose 3$ etc until you reach 10$ and then you start over,this is my favourite one

bet pattern:1$(win or lose) 2$(win or lose) 3$(win or lose) 4$ etc..until you reach your point or make a profit.
OR
You bet the same exact bet until you either get ahead or don't get ahead then raise your bets once you either get ahead or lose some until you get ahead and quit
pattern:2$,2$,2$,4$,4$,4$,6$,Quit
On any given graph or chart the martingale and flatbetting is downhill,personally I like to vary my betting patterns so the machine cant analyse me or the pit boss.Ofcourse having a betting strategy is better than none,but it should revolve around the size of your bankroll.
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Please don't take me for a clown that never actually gambled