Go here to SNG articles Study SNG strategy and ICM and the play 6 5$ SNGs or 3 -10$ SNG or 2- 15$ SNGs whicever is more comfortable for you and if you don't have that control to stop playing thinking you can win it back STAY AWAY from cash games this is what I would do so I recomend you to do it heheh good luck!
there is such a thing in poker: after a big win there is a black line! you need to be very careful and manage your bankroll properly! It seems to me that this is a matter of human psychology: after winning, we feel like a very good player, play more dubious hands and bluff more often, which leads to a decrease in bankroll!