Hand 1: Flopped a medium flush here in the BB, I lead out on the flop and turn, and on the river it's tricky. Any 8/4 makes a full house, but a J will likely call another bet. Should I check or bet? And if I bet - what amount?

Party Poker
No Limit Holdem Ring game
Blinds: $0.25/$0.50
6 players
Converter

Stack sizes:
UTG: $62.95
UTG+1: $91.05
CO: $42.55
Button: $67.45
SB: $26.83
Hero: $50.15

Pre-flop: (6 players) Hero is BB with 3 Q
UTG calls, UTG+1 folds, CO calls, Button folds, SB calls, Hero checks.

Flop: 8 J 4 ($2, 4 players)
SB checks, Hero bets $2, 2 folds, SB calls.

Turn: 4 ($6, 2 players)
SB checks, Hero bets $5, SB calls.

River: 8 ($16, 2 players)
SB checks, Hero ????

Results:
Final pot: $16

Hand 2: I had been raising in position with a lot of these marginal but solid hands and punishing limpers. Usually they would all fold, but on the occasions I got called a c-bet was enough to take down the pot. I got limp reraised minimum by this guy, which I figured to be AA or KK, and with great implied odds I took a flop. I flopped top pair Q kicker and he lead into me weakly, and I just smooth called. The turn gives me top two pair, and he leads again but it's almost a fourth of the pot which looks weak. What is the best way to play this turn? Smooth call again or raise? And if I raise, to how much and why?

Party Poker
No Limit Holdem Ring game
Blinds: $0.25/$0.50
6 players
Converter

Stack sizes:
UTG: $42.50
UTG+1: $98.97
CO: $20.86
Hero: $56.10
SB: $22.75
BB: $42.50

Pre-flop: (6 players) Hero is Button with Q T
UTG calls, 2 folds, Hero raises to $3, 2 folds, UTG raises to $5.5, Hero calls.

Flop: T 3 4 ($11.75, 2 players)
UTG bets $4, Hero calls.

Turn: Q ($19.75, 2 players)
UTG bets $5, Hero ???

Results:
Final pot: $19.75

Hand 3: I had noticed the table was very solid and most raises were getting respect, so I made a loose raise with 68d on the button. The SB called and I flopped a gutshot, my c-bet was called and the turn gave me the nuts. He checks again. Should I check here to induce a river bet or fire again and hope he comes along for the ride? And what is the proper bet size?

Party Poker
No Limit Holdem Ring game
Blinds: $0.25/$0.50
6 players
Converter

Stack sizes:
UTG: $32.35
UTG+1: $54.25
CO: $14.50
Hero: $51.95
SB: $33.45
BB: $49.50

Pre-flop: (6 players) Hero is Button with 6 8
3 folds, Hero raises to $2, SB calls, BB folds.

Flop: 5 9 4 ($4.5, 2 players)
SB checks, Hero bets $4, SB calls.

Turn: 7 ($12.5, 2 players)
SB checks. Hero ????

Results:
Final pot: $12.5