Xbones,
Make sure that when your betting its large enough that they don't have pot odds to call it.

If the pot is $8 and you bet $2 of course they will call on an open straight or a flush draw. They are getting 5:1 on their money.

I hit top pair/kicker on an $8 pot I would at least bet the pot or larger. Thats the agressive part of "tight agressive"

You have the best hand right now and need to make them pay for it.

You'll end up taking down more hands on the flop with bets like this too.
The smaller $3-4 pots you take down like this will help you more than the 1-2 big onesy ou hit a night.