Continuation Bet?

[smarterthanyoda]

I'm a fairly inexperienced player. I tend to play weak-tight, so I've been working on my aggression.

So, here's the situation:
Middle of a B&M tourney. I just got moved to this tablo, and haven't seen the villain play.
Blinds 500-1000. I'm on the button with T14,500, the villian's in the small blind with ~22,000. I have (K[img]/images/graemlins/spade.gif[/img] J[img]/images/graemlins/diamond.gif[/img]).

All fold to me, I raise to T3,000. Villain calls.
Flop: A[img]/images/graemlins/club.gif[/img] 8[img]/images/graemlins/club.gif[/img] 4[img]/images/graemlins/diamond.gif[/img]
Villain checks.
What do I do?