Gii pre no matter what resistence your facing.
Bet every street 3/4 to pot if theres no Ace out there and less than 2 people in the pot
3 people you really need to make sure the texture of the board and make sure your not giving people the right price to chase their drawing hands, that's the biggest mistake known and it can often be due to being afraid of losing before you've already played the hand.
Read up on Way behind/Way thread and that could help... I find against bad players it does but the good players will know their Ax rags are good unless ofc your even better and keep them guessing and disguise all ur hands well. *balanced hand ranges is important as well*
One scenario with way behind/way ahead.
u 3bet and he calls.
A89 comes out on the board.
he checks and now you check... Which means now if he has QQ or JJ you should be able to draw some value out of him and keep those weaker hands in... Where as if you raise the flop al those hands you want to call will fold. It's a tough one though to get your head around.