Need help with my river play ( live 1/2).

[TenFourOff]

Just finished playing live $1/2. I didn't do so hot. Two hands bother me. I am questioning my river play on both, although comments on all streets are welcome.

Hand 1. Third hand on a new table. Of note, I showed down the first hand I was dealt which was AQ suited UTG. On that hand I raised pf, made a c-bet which was called, then went check/check and lost against a pair of sixes.

Dealt A[img]/images/graemlins/heart.gif[/img]K[img]/images/graemlins/diamond.gif[/img] on button.
pf two limpers, I raise to $12, SB and BB fold, both limpers call.
Flop Q[img]/images/graemlins/spade.gif[/img]Q[img]/images/graemlins/heart.gif[/img]9[img]/images/graemlins/club.gif[/img]
checked to me and I check
Turn 10[img]/images/graemlins/diamond.gif[/img]
checked to me, and I bet out $25, one limper calls
River J[img]/images/graemlins/heart.gif[/img]
limper bets $20, what's my play?

Second hand:
At this time I'm down to $125 of my second buy-in having just lost $70 when I folded an overpair on the river on a fairly safe board to what I believe to have been either two pair or a set (I have vowed not to go broke with just a pair). All relevant players have me covered. The villian in this hand is who I just folded to.
Dealt 8[img]/images/graemlins/club.gif[/img]10[img]/images/graemlins/club.gif[/img] in BB
pf 4 limpers, small blind completes, I check.
flop (6 players) 6[img]/images/graemlins/club.gif[/img]9[img]/images/graemlins/club.gif[/img]Q[img]/images/graemlins/heart.gif[/img]
First limper bets $10, one fold, two more calls, SB folds, I call.
Turn (four players) 4[img]/images/graemlins/club.gif[/img]
I check, planning to check/raise, but checked around
River (four players) J[img]/images/graemlins/heart.gif[/img]
I bet $20, one fold, I'm mini-raised to $45, folded to me. What's my move?