Need advice on improving shorthanded/h.u. play

[bcubed72]

Im a reasonably new hold 'em player (7mo) who made the switch to tournament play last month. I have compiled the results of one month's play. First, the good news: so far (playing $30+3 10 handed) I have finished in the (top 3) money 53 of 110 tries (48%)--11 1st, 20 2nd, 22 3rd. I have beat the game an average of $10.36 per session.
Now the bad news: as you can see from my stats, I am finishing first much less often than 2nd or 3rd. I am losing about $5 per session copmared to an even distribution of all three paying places. I attribute this to three possible factors, which I will list in increasing order of importance: Random variation due to small sample size, overly conservative play, and lack of heads up skill.
The first is self-explanitory. As for the second, I play a generaly risk-averse style of play, coming in big only when I have a sizable advantage over my opponents. This style probably increases my chances of finishing in the money, but leaves me somewhat short-stacked when I get there--hence fewer 1sts. Finally, I need to consider that I am not as good (yet) as I need to be a h.u. play. This is not surprizing: after all, up until 1 mo. ago, all of my experience, and most of my reading, focused on how to beat a 10 handed, limit, hold 'em game.
What I would like from the readers of this site is to hear how you learned to be a skilled shorthanded/ h.u. player. Any references you can reccomend, as well as tips you can give, will be greatly appreciated. I'm winning now, but I know I have yet to play my best poker. I realistically forsee beating the game for close to $20/session with some basic improvement in my game.