1) Make a good hand: TPGK or better.
2) Bet it really hard like you have the nuts. 2/3 pot bets = hard.
3) If you get raised , fold unless you have the near nuts. Because fishies only ever get aggressive when they have really good hands.
4) Don't use tricky plays. Tricky plays are check raises etc. Just bet.
5) Forget about image. At 25NL you have no image.
6) Basically you are set hunting. Live with it, it makes money.
7) If you have less then or equal to TPTK and you get raised you should fold, always.
8) Rince, repeat and it all comes out in the wash.