Just considering the rake, I would recommend moving your roll off of Full Tilt (10% at $10NL sux ass)

As mentioned, the reduced buyin is odd, It could've helped you to fold the QQ hand if you were full stacked there...

#1. A2o If you can just get in the habit of folding all of these AX hands (A8 or less) you would be in a lot better shape. They are nothing but trouble! Obviously you would've easily folded had he raised the turn...

#2. KQs Against the Shorty this is an EASY call. Gamble with the shortstacks in these Head-Up situations.

#3. 99 Are you kidding? How could you even think about folding this? This was a GREAT CALL, don't tell yourself it was a bad call just cause he flipped over a better hand... this is being results oriented, don't go down that path. Villian has a super large range that you are doing great against.

#4. QQ
#1, villian is raising UTG.
#2 Villian has a full stack, in fact, the ONLY full stack at the table, which lends to him being a "better" player.
#3 Your image is tight, and if he knows that then his range is even MORE polarized!
While not an easy fold, (and I don't fold because of your shortstack probably) if you had a full stack, you could've folded here, as villians range is at the loosest JJ+, AQs+ which you only have 44% equity against. Tightening that up to a very likely KK+, AKs gives us 27% which is a super easy fold.

#5. AA Standard. Sucks, but nothing you could do there. Last night my AA < AQs AIPF... happens...

#6. AKo Standard Isolation re-push. Very good, but only because of your shortstack. If you had had a full stack, this could've been a much more interesting hand...

In short, you need to learn to still play tight no matter what your stack size is, but you want to have as big a stack as possible to capitalize when a monster situation comes up. I hope that I don't see a HH from you where you missed out on 150BBs because you only had a 50BB stack...