When should I have known I was beat?

[filsho]

Here are a couple hands from the home game I played in last night, tourney style. Tourney only pays top 2, these hands are all with 3 left.

Hand 1
Blinds 20/40, 3 handed. I have about twice the chips the BB has. (let's call em 1500, 600). I'm on the button, dealt 8 [img]/images/graemlins/club.gif[/img] 10 [img]/images/graemlins/spade.gif[/img] and limp in.
SB folds, BB checks.
Flop
3 [img]/images/graemlins/spade.gif[/img] 10 [img]/images/graemlins/club.gif[/img] 7 [img]/images/graemlins/spade.gif[/img]
BB checks, I bet 80. BB calls.

Turn
2 [img]/images/graemlins/heart.gif[/img]
BB checks, I bet 120, BB calls.

River
5 [img]/images/graemlins/diamond.gif[/img]
BB hesitates, checks, then says, "oops I wnated to bet" (yeah..seriously), so I check.
Results: <font color="white">
I have a pair of tens, 8 kicker
BB has J clubs 10 clubs, tens w/Jack kicker. </font>

Hand 2
Still 3 handed, blinds still 20/40, again on the button. Stacks are about 1200 for the both of us.
I'm dealt 6 [img]/images/graemlins/club.gif[/img] 6 [img]/images/graemlins/diamond.gif[/img]
I reaise to 120.
SB folds
BB calls (same person I was against previously)
Flop comes
3 [img]/images/graemlins/spade.gif[/img] 10 [img]/images/graemlins/heart.gif[/img]5 [img]/images/graemlins/spade.gif[/img]
BB checks, I bet 100. BB calls.
Turn
J [img]/images/graemlins/club.gif[/img]
BB checks, I bet 100. BB calls.
River
4 [img]/images/graemlins/diamond.gif[/img]
BB bets 100. I call.

Results: <font color="white">
I have 6 6, one pair, sixes
BB shows AJ, one pair, jacks </font>

Hand 3
Blinds are 40/80, the villian has me covered by now, about 800 to 1500. Again, I'm on the button against the same person in the BB.

Dealt K [img]/images/graemlins/diamond.gif[/img] Q [img]/images/graemlins/club.gif[/img]
I raise to 180. SB folds, BB calls.
Flop comes
3 [img]/images/graemlins/spade.gif[/img] 10 [img]/images/graemlins/diamond.gif[/img] K [img]/images/graemlins/club.gif[/img]
BB checks, I bet 120. BB calls.

Turn
5 [img]/images/graemlins/diamond.gif[/img]
BB bets 100, I call.

River
9 [img]/images/graemlins/heart.gif[/img]
BB checks, I check.
Results: <font color="white">
I have a pair of kings.
BB shows 3 3 for trip 3s. </font>

Anyone wanna help me out here? I wasn't too far behind the big stack before I ran up against these 3 hands, all within about 15 minutes. Crippled me, had to go into all-in/fold mode &amp; didn't get cards, got blinded away pretty much.