The real trick to roulette is to get lucky, then quit while you're ahead. Every spin has a 1 in 37 (for European) or 1 in 38 (for American) chance of landing in a given pocket.
The best roulette strategy requires you to change the size of the bet based on your results. For example, when using the Martingale strategy, you have to double the bet after a loss and then reset to the initial bet after you win.