Atrocious bubble play

Wow, I now know the worst feeling in poker, finishing on the bubble. With very poor bubble play I did it twice in a row. I then followed it up with 3rd 3rd places. My short handed play is horrible and I am worried that I can't be a winning player if it is this bad. Both of the times going in with large to medium chips stacks. Can you tell me if these playes were right? Also what do I do when the button tries and steal my blind every single time?!! I swear I was so confused. Anyway here are a few situations. What should I do or what should I have done?

1. PokerStars No-Limit Hold'em Tourney, Big Blind is t150 (4 handed) converter

BB (t670)
UTG (t2930)
Button (t5540)
Hero (t4360)

should I have pushed the BB all in here?! WTF

Preflop: Hero is SB with K, [img]/images/graemlins/heart.gif[/img] 5. [img]/images/graemlins/spade.gif[/img]
3 folds.

Final Pot: t225


2. PokerStars No-Limit Hold'em Tourney, Big Blind is t200 (4 handed) converter

SB (t3080)
BB (t2040)
UTG (t6345)
Hero (t2035)

Preflop: Hero is Button with A, [img]/images/graemlins/club.gif[/img] Q. [img]/images/graemlins/spade.gif[/img]
1 fold, Hero raises to t2010, SB calls t1910, 1 fold.

Flop: (t3995) J, [img]/images/graemlins/diamond.gif[/img] Q, [img]/images/graemlins/club.gif[/img] T [img]/images/graemlins/spade.gif[/img](2 players)

Turn: (t3995) 6 [img]/images/graemlins/heart.gif[/img] (2 players)

River: (t3995) 8 [img]/images/graemlins/diamond.gif[/img] (2 players)

Final Pot: t3995

Got called with J [img]/images/graemlins/spade.gif[/img]J [img]/images/graemlins/club.gif[/img]pf here, is this what I should have done?

3. PokerStars No-Limit Hold'em Tourney, Big Blind is t200 (3 handed) converter

Hero (t2125)
SB (t4780)
BB (t6595)

Preflop: Hero is Button with J [img]/images/graemlins/spade.gif[/img], T [img]/images/graemlins/diamond.gif[/img].
Hero calls t200, SB completes, BB checks.

Flop: (t600) T [img]/images/graemlins/club.gif[/img], 7 [img]/images/graemlins/spade.gif[/img], 7 [img]/images/graemlins/club.gif[/img] (3 players)
SB checks, BB checks, Hero bets t400, SB folds, BB raises to t800, Hero raises to t1925, BB calls t1125.

Turn: (t4450) 3 [img]/images/graemlins/heart.gif[/img] (2 players)

River: (t4450) 4 [img]/images/graemlins/diamond.gif[/img](2 players)

Final Pot: t4450

Help is needed, but I know you guys are there.

Thanks alot,
Al