I'm going to give you a secret roulette system that really works. It will cut the house advantage to literally nothing, if you believe in it enough to never get frustrated and switch tactics. What I'm going to say may seem strange, but here goes.
First, never bet simply red or black. Also don't bet odd or even. These are equally poor, consistently losing wagers.
Second, don't be suckered into betting zero or double zero, despite what some experts may suggest. This may seem like you're betting with the house, but for technical reasons you are actually betting against the house -- and you are taking the worst of it.
So, in order to negate the house advantage, you MUST stick to straight non-green number bets. All odd red numbers turn out to be bad choices, based on over two trillion computer trials. Don't bet them.
All even black numbers fair poorly, and cannot be bet, for much the same reason, which I won't explain here.
Let's get straight to the money-saving advice. Any bet you decide to make MUST cover only even-red or odd-black numbers. There are no exceptions.
Finally, you need to be very disciplined in excluding the number 30 and the group of consecutive numbers that begins with 11 and continues clockwise through and including 14.
This system may seem mystical, but I take gambling quite seriously, and this works for me.
Just to add to your comment on how this system is completely worthless. 1 spin will in no way effect the next spin. Each time that wheel goes round and the ball is dropped it is a single random event. So the low numbers can hit a million times in a row and the probability will still be the same.
Red can hit a Billion times in a row and the next spin will still be a 50/50 bet.