Winning mentality is imported when playing Roulette .
When playing on even chance bets like low or high ext (or any way you like). . . . . . . and you bet selection is consisted leave when you only reached a small winning margin.
At the end of the day all drops fill the glass.
Increase your bankroll consistent with the bets won in previous sessions. . still aim for small winning ratio. . . but then with bigger returns.
Leave when you are winning.