I've had to move down stakes after a horrible downswing, and my confidence is getting back up again. But I've never been sure about the best value plays for these hands. Bet the river, or just check behind?

------HAND 5------
Game #2760383774: Hold'em NL ($0.15/$0.25) - 2006/06/21 - 15:52:29 (UK)
Table "Saga" Seat 2 is the button.
Seat 1: ghstface ($20 in chips)
Seat 2: Smiffy44 ($24.40 in chips)
Seat 3: Ellenborg ($14.70 in chips)
Seat 4: malc ($6.60 in chips)
Seat 5: carl_a ($51.46 in chips)
Seat 6: Jozeph ($4.60 in chips)
Seat 7: shewp ($11.20 in chips)
Seat 8: RiverQi ($23.22 in chips)
Seat 9: bb1962 ($21.75 in chips)
Seat 10: Spirit ($15.35 in chips)
Ellenborg: posts small blind $0.15
malc: posts big blind $0.25
ghstface sits out
----- HOLE CARDS -----
dealt to Smiffy44 [8s Tc]
carl_a: folds
Jozeph: folds
shewp: calls $0.25
RiverQi: calls $0.25
bb1962: folds
Spirit: calls $0.25
Smiffy44: calls $0.25
Ellenborg: calls $0.10
malc: checks
----- FLOP ----- [6d 9s Ts]
Ellenborg: checks
malc: checks
shewp: checks
RiverQi: bets $0.50
Spirit: calls $0.50
Smiffy44: raises to $2
Ellenborg: folds
malc: folds
shewp: folds
RiverQi: calls $1.50
Spirit: folds
----- TURN ----- [6d 9s Ts][5d]
ghstface sits back
RiverQi: checks
Smiffy44: bets $3
RiverQi: calls $3
----- RIVER ----- [6d 9s Ts 5d][Qh]
RiverQi: checks
Smiffy44: checks