...what's your next move on these hands?

Hand 1

BB has a clue
SB is fishy, calls with any pair/draw.

Party Poker No-Limit Hold'em, $0.50 BB (6 max, 6 handed) converter

UTG ($11.35)
Fnord ($50.85)
CO ($40.22)
Button ($28.35)
SB ($32.71)
BB ($42.10)

Preflop: Fnord is MP with J, A.
UTG folds, Fnord raises to $1.5, CO calls $1.50, Button folds, SB calls $1.25, BB calls $1.

Flop: ($6) J, 6, 8 (4 players)
SB bets $1, BB calls $1, Fnord raises to $5, CO folds, SB calls $4, BB calls $4.

Turn: ($21) T (3 players)
SB checks, BB bets $5, Fnord ???

Hand 2

CO has a clue.

Party Poker No-Limit Hold'em, $0.50 BB (6 max, 6 handed) converter

Button ($18.25)
Fnord ($24.50)
BB ($34.80)
UTG ($32.60)
MP ($41.21)
CO ($27.42)

Preflop: Fnord is SB with A, J.
UTG calls $0.50, MP calls $0.50, CO calls $0.50, Button folds, Fnord completes, BB checks.

Flop: ($2.50) 6, 2, A (5 players)
Fnord checks, BB checks, UTG checks, MP checks, CO bets $2, Fnord raises to $6, BB folds, UTG folds, MP folds, CO raises to $26.92 (All-In), Fnord ???

Hand 3

SB is very fishy, calls with any pair/draw.

Party Poker No-Limit Hold'em, $0.50 BB (6 max, 5 handed) converter

UTG ($26.60)
Fnord ($31.05)
Button ($59.07)
SB ($22)
BB ($48.75)

Preflop: Fnord is CO with 9, A.
UTG folds, Fnord raises to $1.5, Button folds, SB calls $1.25, BB folds.

Flop: ($3.50) 2, 9, Q (2 players)
SB bets $1, Fnord raises to $3, SB calls $2.

Turn: ($9.50) K (2 players)
SB checks, Fnord checks.

River: ($9.50) 2 (2 players)
SB bets $2, Fnord ???

Hand 4

UTG is loose, but otherwise solid

Party Poker No-Limit Hold'em, $0.50 BB (6 max, 4 handed) converter

Fnord ($29.40)
UTG ($30.75)
Button ($24.20)
SB ($34.05)

Preflop: Fnord is BB with Q, K.
UTG calls $0.50, Button folds, SB completes, Fnord checks.

Flop: ($1.50) 5, 8, Q (3 players)
SB checks, Fnord bets $2, UTG calls $2, SB folds.

Turn: ($5.50) 9 (2 players)
Fnord bets $4, UTG calls $4.

River: ($13.50) 7 (2 players)
Fnord checks, UTG bets $6, Fnord ???