The best way to win more games on roulette (or to minimize the risk to lose money on the roulette wheel, if you wish) is to focus on the outside bets. Although these roulette bets do not lead to mind-blowing wins, keeping your bets on the odds/even, red/black, and high/low gives you the highest chances to score a win.
John "Soap" MacTavish began the SAS selection process in 2014 at the age of 18. He is said to be at least 26 years old. He was the youngest applicant to pass the SAS selection in the annals of the British Army.