Leak #2 Paired flops

I have difficulty on paired flops when I don't have the trips.

3/6 or 4/8 live with usual suspects as opponents.

I have A [img]/images/graemlins/diamond.gif[/img]8 [img]/images/graemlins/diamond.gif[/img] in HJ and the flop comes

8 [img]/images/graemlins/heart.gif[/img]4 [img]/images/graemlins/spade.gif[/img]4 [img]/images/graemlins/club.gif[/img]

What should i be thinking if

1) I am bet into?

2) I am bet into and already called before it gets to me

3) I am checked to?

what should I be thinking when the turn is a rag and the above scenarios have played out?

My history is to be pretty aggressive and bet or raise flop and turn. I also bet or call on the river if I have position.