If you cannot handle losing $600, do not play those stakes.

You need to keep track of how people to play and who does what. Keep track of the players who are limping with the premiums and the ones who are raising with anything. Keep track of the players who only bet with the nuts and those who will call with marginal hands. You should know which players will fold to c bets and double barrels and which ones won't. etc etc etc ... You're only playing one table and the hands are super slow, so use this extra time to bank information and put people on ranges when you're not in a hand.