Here's a few hands I felt I left money on the table. Comments?

Hand 1

***** Hand History for Game 2865159769 *****
tdpalermo has left the table.
0/0 Omaha Game Table (PL) - Thu Oct 27 19:19:14 EDT 2005
Table Table 36722 (Real Money) -- Seat 1 is the button
Total number of players : 7
Seat 1: Jack_tl ( $40.43)
Seat 2: Trawlcapt ( $26.95)
Seat 3: DTRELOAD ( $17.65)
Seat 5: WindsOfWar20 ( $26.50)
Seat 7: Snuffy23 ( $5.80)
Seat 9: briachek4 ( $37.80)
Seat 10: hoegarden ( $23)
Trawlcapt posts small blind (0.10)
DTRELOAD posts big blind (0.25)
** Dealing down cards **
Dealt to briachek4 [ Qc, 4c, Qs, Tc ]
WindsOfWar20 calls (0.25)
Snuffy23 calls (0.25)
briachek4 calls (0.25)
Jack_tl folds.
Trawlcapt calls (0.15)
DTRELOAD checks.
** Dealing Flop ** : [ Ac, 3s, Qh ]
Trawlcapt bets (0.25)
DTRELOAD folds.
WindsOfWar20 folds.
Snuffy23 folds.
briachek4 raises (1.95) to 1.95
Trawlcapt calls (1.70)
** Dealing Turn ** : [ 7c ]
Trawlcapt bets (2)
briachek4 raises (10.90) to 10.90
Trawlcapt calls (8.90)
** Dealing River ** : [ Ts ]
Trawlcapt checks.
briachek4 checks.
** Summary **
Main Pot: $25.65 | Rake: $1.30
Board: [ Ac 3s Qh 7c Ts ]
Trawlcapt balance $13.85, lost $13.10 [ 9s 8s 7d Ad ] [ two pairs, aces and sevens -- Ad,Ac,Qh,7d,7c ]
briachek4 balance $50.35, bet $13.10, collected $25.65, net +$12.55 [ Qc 4c Qs Tc ] [ three of a kind, queens -- Ac,Qc,Qs,Qh,Ts ]

Hand 2

***** Hand History for Game 2865134328 *****
0/0 Omaha Game Table (PL) - Thu Oct 27 18:46:39 EDT 2005
Table Table 36722 (Real Money) -- Seat 8 is the button
Total number of players : 10
Seat 1: Jack_tl ( $30.98)
Seat 2: ilovedeath ( $25)
Seat 3: DTRELOAD ( $18.30)
Seat 4: mdoz2005 ( $5.20)
Seat 5: WindsOfWar20 ( $20.30)
Seat 6: tdpalermo ( $17.25)
Seat 7: Snuffy23 ( $19.50)
Seat 8: in_training7 ( $55.95)
Seat 9: briachek4 ( $26.45)
Seat 10: hoegarden ( $23.35)
briachek4 posts small blind (0.10)
hoegarden posts big blind (0.25)
** Dealing down cards **
Dealt to briachek4 [ Qh, 7d, Ac, 7c ]
Jack_tl calls (0.25)
ilovedeath folds.
DTRELOAD calls (0.25)
mdoz2005 calls (0.25)
WindsOfWar20 calls (0.25)
tdpalermo calls (0.25)
Snuffy23 calls (0.25)
in_training7 folds.
briachek4 calls (0.15)
hoegarden checks.
** Dealing Flop ** : [ 6c, 7s, 2c ]
briachek4 bets (1.90)
hoegarden folds.
Jack_tl folds.
DTRELOAD folds.
mdoz2005 folds.
WindsOfWar20 folds.
tdpalermo calls (1.90)
Snuffy23 folds.
** Dealing Turn ** : [ 3h ]
briachek4 bets (5.55)
tdpalermo calls (5.55)
** Dealing River ** : [ 6s ]
briachek4 bets (5)
tdpalermo calls (5)
** Summary **
Main Pot: $25.60 | Rake: $1.30
Board: [ 6c 7s 2c 3h 6s ]
tdpalermo balance $4.55, lost $12.70 [ Jc 6h 9c 8c ] [ three of a kind, sixes -- Jc,7s,6h,6c,6s ]
briachek4 balance $39.35, bet $12.70, collected $25.60, net +$12.90 [ Qh 7d Ac 7c ] [ a full house, Sevens full of sixes -- 7d,7c,7s,6c,6s ]

He had less than $10 left and I bet about half that. If he would call $5, he would probably call all in but if he was folding, he wouldn't call anything. Should I have check raise? Just put him all in?

Hand 3

***** Hand History for Game 2865125507 *****
0/0 Omaha Game Table (PL) - Thu Oct 27 18:35:30 EDT 2005
Table Table 36761 (Real Money) -- Seat 6 is the button
Total number of players : 10
Seat 1: ilovedeath ( $25.70)
Seat 2: D_312 ( $44.92)
Seat 3: omahatma ( $19.33)
Seat 4: WindsOfWar20 ( $18.10)
Seat 5: DTRELOAD ( $27.56)
Seat 6: briachek4 ( $26.81)
Seat 7: hoegarden ( $10.80)
Seat 8: eisley ( $24.30)
Seat 9: saches ( $24.22)
Seat 10: Slick_75o ( $25.95)
hoegarden posts small blind (0.10)
eisley is sitting out.
saches posts big blind (0.25)
** Dealing down cards **
Dealt to briachek4 [ Jd, 2s, Ac, Jh ]
Slick_75o folds.
ilovedeath folds.
D_312 folds.
omahatma calls (0.25)
WindsOfWar20 calls (0.25)
DTRELOAD calls (0.25)
briachek4 calls (0.25)
hoegarden calls (0.15)
saches checks.
** Dealing Flop ** : [ 8s, 7c, Js ]
hoegarden checks.
saches checks.
omahatma checks.
WindsOfWar20 checks.
DTRELOAD checks.
briachek4 checks.
** Dealing Turn ** : [ 8h ]
hoegarden checks.
saches checks.
omahatma checks.
WindsOfWar20 checks.
DTRELOAD bets (1.45)
briachek4 calls (1.45)
hoegarden folds.
saches folds.
omahatma folds.
WindsOfWar20 folds.
** Dealing River ** : [ Ad ]
DTRELOAD bets (4)
briachek4 raises (16.20) to 16.20
DTRELOAD calls (12.20)
** Summary **
Main Pot: $35 | Rake: $1.80
Board: [ 8s 7c Js 8h Ad ]
DTRELOAD balance $9.66, lost $17.90 [ Ah Qd 8d Kh ] [ a full house, Eights full of aces -- Ah,Ad,8d,8s,8h ]
briachek4 balance $43.91, bet $17.90, collected $35, net +$17.10 [ Jd 2s Ac Jh ] [ a full house, Jacks full of eights -- Jd,Jh,Js,8s,8h ]

If I raised something on the turn, I could have put in a big enough bet to stack him on the river. Do you not raise to hope to not scare him away?

First one always confuses me, I'd do the same. Second one I put it AI on the river. Third I was fine.

hand 1 seems OK. Hand 2 seems to be crying out for a flop CR in which case you'd have basically had him in on the turn and there's no story. Hand 3 I could go either way. I think your play is pretty decent really.