Before you start looking for winning strategies, you need to #gclub4laos
understand one cardinal truth. The past has no influence on future. There is no 100% successful strategy for winning roulette or any other casino game.
Many casinos offer a pre printed card with all the numbers printed on it for the bettors to keep a track of what numbers have been hit and what have not. This strategy never works. If it did work, the casino will ban players from doing it. So, if the casinos are lending you a helping hand, there is something fishy about it.
Still, there are some basic underlying principles which can amount to strategies. First, play a European roulette, which has only one zero and only 37 slots. The American roulette has an extra 00, totalling to 38 slots. This gives the advantage to the house. So play European roulette to get better advantage.
Never bet all over the table on all numbers. You may win, but this money will be very less compared to what you would have betted. Playing online means, the mechanical wear and tear of the roulette wheel to favour a particular set of number is reduced. Gives you a fair game and you can learn and test strategies for free with free online roulette websites.