Problems playing moderate hands

I'm having problems playing moderate hands - I'm having trouble knowing when to stay in and as a result I'm playing weak and losing out on some wins !

I'm usually thinking " I have a feeling I'm ahead here, but do I want to risk my chips for so little against all these opponents ? " but then I'm folding some winning hands !

I'd like to hear what some of the better players would do here.

Here are some examples :

PokerStars No-Limit Hold'em, $0.25 BB (9 handed) FTR converter on zerodivide.cx

BB ($24.60)
UTG ($9.75)
UTG+1 ($41.45)
MP1 ($16.70)
MP2 ($39.60)
MP3 ($39.80)
CO ($15.50)
Button ($15.20)
Hero ($23.55)

Preflop: Hero is SB with Q, 3.
UTG calls $0.25, 1 fold, MP1 calls $0.25, MP2 calls $0.25, 2 folds, Button calls $0.25, Hero completes, BB checks.

Flop: ($1.50) 6, Q, 4 (6 players)
Hero checks, BB checks, UTG checks, MP1 checks, MP2 checks, Button checks.

Turn: ($1.50) 9 (6 players)
Hero checks, BB checks, UTG checks, MP1 checks, MP2 checks, Button bets $1, Hero folds, BB folds, UTG calls $1, MP1 folds, MP2 calls $1.

River: ($4.50) 8 (3 players)
UTG checks, MP2 checks, Button checks.

Final Pot: $4.50

Another :

PokerStars No-Limit Hold'em, $0.25 BB (9 handed) FTR converter on zerodivide.cx

CO ($19.50)
Button ($30.50)
SB ($26.65)
BB ($39.45)
UTG ($22.60)
UTG+1 ($32.25)
Hero ($30.10)
MP2 ($23.45)
MP3 ($10.60)

Preflop: Hero is MP1 with 8, 8.
1 fold, UTG+1 calls $0.25, Hero calls $0.25, MP2 calls $0.25, MP3 calls $0.25, 3 folds, BB checks.

Flop: ($1.35) 9, 2, 6 (5 players)
BB checks, UTG+1 checks, Hero checks, MP2 checks, MP3 bets $1, BB folds, UTG+1 calls $1, Hero folds, MP2 folds.

Turn: ($3.35) 2 (2 players)
UTG+1 checks, MP3 bets $2, UTG+1 calls $2.

River: ($7.35) 9 (2 players)
UTG+1 checks, MP3 checks.

Final Pot: $7.35

Thanks,

Martin