How badly did I misplay this set?

PokerStars No-Limit Hold'em Tourney, Big Blind is t100 (7 handed) converter

SB (t2715)
Hero (t1135)
UTG (t2385)
MP1 (t4110)
MP2 (t825)
CO (t1370)
Button (t960)

Preflop: Hero is BB with 6[img]/images/graemlins/diamond.gif[/img], 6[img]/images/graemlins/spade.gif[/img].
<font color="#666666">3 folds</font>, <font color="#CC3333">CO raises to t300</font>, <font color="#666666">2 folds</font>, Hero calls t200.

Flop: (t650) 6[img]/images/graemlins/heart.gif[/img], T[img]/images/graemlins/club.gif[/img], 8[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, CO checks.

Turn: (t650) Q[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets t200</font>, CO calls t200.

River: (t1050) J[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets t500</font>, <font color="#CC3333">CO raises to t870</font>, Hero calls t135 (All-In).

Final Pot: t2555

Results in white below: <font color="#FFFFFF">
Hero has 6d 6s (three of a kind, sixes).
CO has Kh Ad (straight, ace high).
Outcome: CO wins t2555. </font>