The DON'T COME BET is reverse of the come bet. Players lose on a 7 or 11, and win if the roll is 2 or 3. If the 12 rolls, the don't come bet is a push. Any other number becomes the don't come point.
A draw no bet simply works by eliminating the option of a draw from a bet. Therefore, as a bettor, you can place your wagers either on a home or away win. This means that if your predictions are correct, you win. However, if the game ends in a draw, your wager is refunded since there is neither a win nor loss.
Martingale is definitely one of the most widely known and most successful roulette strategies (for some it is the best roulette strategy), and it is very simple to apply. It can be used only for outside bets, those that provide almost 50% chance of winning, and excluding the 0.