Should I have done anything differently here?

[HoyaLawya]

I've been reading 2+2 faithfully for more than a year, but this is my first post...I am only able to play 2-3 times a week (sometimes more, sometimes less), and not always for long periods of time. So...I'm still a beginner, but I'm trying to learn.

Anyway, I was just fooling around earlier today, and had this hand. I was rivered, but I was wondering if I should have played it differently at any point.

Since I've been trying to think seriously about the theory behind the game lately (just finished SSHE by Miller/Sklansky/Malmuth), when this hand popped up, I thought today would be a good day to finally sign up (been meaning to for ages) and see what you all thought.

Poker Stars, $0.02/$0.04 Limit Hold'em Cash Game, 7 Players
LegoPoker Hand History Converter

Pre-Flop: Q[img]/images/graemlins/diamond.gif[/img] A[img]/images/graemlins/diamond.gif[/img] dealt to Hero (MP)
2 folds, <font color="red">Hero raises</font>, CO calls, <font color="red">BTN 3-bets</font>, <font color="red">SB caps</font>, BB folds, Hero calls, CO calls, BTN calls

Flop: (17 SB) 8[img]/images/graemlins/diamond.gif[/img] A[img]/images/graemlins/spade.gif[/img] 5[img]/images/graemlins/diamond.gif[/img] (4 Players)
<font color="red">SB bets</font>, <font color="red">Hero raises</font>, CO calls, <font color="red">BTN 3-bets</font>, SB calls, <font color="red">Hero caps</font>, CO calls, BTN calls, SB calls

Turn: (16.5 BB) 2[img]/images/graemlins/club.gif[/img] (4 Players)
SB checks, <font color="red">Hero bets</font>, CO calls, BTN calls, SB calls

River: (20.5 BB) K[img]/images/graemlins/heart.gif[/img] (4 Players)
SB checks, <font color="red">Hero bets</font>, CO calls, BTN calls, SB folds

Results: 23.5 BB Pot (1 BB Rake)
Hero showed Q[img]/images/graemlins/diamond.gif[/img] A[img]/images/graemlins/diamond.gif[/img] (a pair of Aces) and LOST (-6 BB NET)
CO mucked A[img]/images/graemlins/club.gif[/img] 7[img]/images/graemlins/spade.gif[/img] and LOST (-6 BB NET)
BTN showed K[img]/images/graemlins/club.gif[/img] A[img]/images/graemlins/heart.gif[/img] (two pair, Aces and Kings) and WON 22.5 BB (+16.5 BB NET)