2 hands w/ JJ I'm lost

[JReezy]

Hand 1 vs unkown no real reads he's 40/17/1.5 over 40 hands.
When he minraises me on flop should I just be calling? I don't usually like to do that in this type of situation. After he calls I figured I had to be beat with that turn card and just planned on shutting down. Should I have played the hand any differently?

Full Tilt Poker - No Limit Hold'em Cash Game - $3/$6 Blinds - 3 Players - (LegoPoker HH Converter)

SB: $1,297.70
BB: $600.00
Hero (BTN): $591.00

Preflop: Hero is dealt J[img]/images/graemlins/heart.gif[/img] J[img]/images/graemlins/diamond.gif[/img] (3 Players)
<font color="red">Hero raises to $21.00</font>, SB calls $18.00, BB folds

Flop: ($48) 8[img]/images/graemlins/club.gif[/img] 7[img]/images/graemlins/heart.gif[/img] 4[img]/images/graemlins/club.gif[/img] (2 Players)
SB checks, <font color="red">Hero bets $36.00</font>, <font color="red">SB raises to $72.00</font>, <font color="red">Hero raises to $193.00</font>, SB calls $121.00

Turn: ($434) 5[img]/images/graemlins/club.gif[/img] (2 Players)
SB checks, Hero checks

River: ($434) K[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">SB bets $434.00</font>, Hero folds
Uncalled bet of $434.00 returned to SB

Pot Size: $434.00 ($1 Rake)


Hand 2 was against agility bob who i have as a total fish running at 42/19/5.5. his preflop 3bet could mean any hand the way he was playing, as previously he had shown down T7 os after making the same 3bet preflop. Am I correct to fire the flop and turn? Should I shut down after he calls my flop bet? When he checkraised me on turn I figured I couldn't be good, does anyone still call on the turn the way it played out? Thanks for any advice.
Full Tilt Poker - No Limit Hold'em Cash Game - $2/$4 Blinds - 2 Players - (LegoPoker HH Converter)

BB: $960.05
Hero (SB): $433.75

Preflop: Hero is dealt J[img]/images/graemlins/club.gif[/img] J[img]/images/graemlins/heart.gif[/img] (2 Players)
<font color="red">Hero raises to $12.00</font>, <font color="red">BB raises to $36.00</font>, Hero calls $24.00

Flop: ($72) 7[img]/images/graemlins/spade.gif[/img] 2[img]/images/graemlins/spade.gif[/img] 4[img]/images/graemlins/spade.gif[/img] (2 Players)
BB checks, <font color="red">Hero bets $63.00</font>, BB calls $63.00

Turn: ($198) 3[img]/images/graemlins/club.gif[/img] (2 Players)
BB checks, <font color="red">Hero bets $144.00</font>, <font color="red">BB raises all-in to $861.05</font>...