Couple of overpair problems, how do you play these?

There's a lot more aggression at 3/6 than what I'm used to and my swings have been wild. I'm running at like 2.8 ptbb/100 after 17k hands which is better than nothing but it definitely needs some help. Here's a couple tough spots:

This first hand was against a pretty standard tag and looking back I think I should have folded that turn if not that flop:
Party Poker
No Limit Holdem Ring game
Blinds: $3/$6
6 players
Converter

Stack sizes:
UTG: $816.55
Hero: $692
CO: $646
Button: $326.15
SB: $928
BB: $892.17

Pre-flop: (6 players) Hero is UTG+1 with A:diamond: A:heart:
UTG calls, Hero raises to $30, CO calls, 2 folds, BB calls, UTG folds.

Flop: 8:heart: T:diamond: K:diamond: ($99, 3 players)
BB checks, Hero bets $85, CO raises to $186, BB folds, Hero calls.

Turn: 7:spade: ($471, 2 players)
Hero checks, CO raises all-in $430, Hero calls.

River: Q:club: ($1331, 1 player + 1 all-in - Main pot: $1331)


Results:
Final pot: $1331




Next one was just weird so I 3bet it. Probably a pretty bad play too. Villain was 18/17 after a few hands but I'd just sat at the table.

Party Poker
No Limit Holdem Ring game
Blinds: $3/$6
6 players
Converter


Stack sizes:
Hero: $627
UTG+1: $600
CO: $227.90
Button: $1445.60
SB: $644.48
BB: $454.68

Pre-flop: (6 players) Hero is UTG with A:heart: A:club:
Hero raises to $24, UTG+1 calls, 4 folds.

Flop: 7:spade: Q:spade: T:club: ($57, 2 players)
Hero bets $47, UTG+1 raises to $220, Hero raises all-in $556, UTG+1 calls all-in $356.
Uncalled bets: $27 returned to Hero.

Turn: 8:spade: ($1209, 0 player + 2 all-in - Main pot: $1209)


River: 5:heart: ($1209, 0 player + 2 all-in - Main pot: $1209)


Villain here was 32/9 but pretty much unknown to me as I'd just began my session when this one took place:
Party Poker
No Limit Holdem Ring game
Blinds: $3/$6
6 players
Converter


Stack sizes:
UTG: $1185
UTG+1: $224.90
CO: $1424.60
Button: $445.42
SB: $547.99
Hero: $741

Pre-flop: (6 players) Hero is BB with K:heart: K:club:
2 folds, CO raises to $18, 2 folds, Hero raises to $44, CO calls.

Flop: T:diamond: 6:club: 6:heart: ($91, 2 players)
Hero bets $75, CO calls.

Turn: 4:club: ($241, 2 players)
Hero bets $150, CO raises to $450, SmackinYaUp...?

Hand 1: Tough spot, vs a nitty player I fold the flop. Vs other players I call the flop and shove a safe turn card. Very read depenndant, but vs a lot of players folding the flop is a mistake. Reraising the flop is no good, because I don't want to get all the money in either completely crushed by a set/two pair or even money with a big draw, you definitely want to try to get it all in on a safe turn, and you did, so nh.

Hand 2: I think calling and pushing a safe turn card is best, but a push isn't all that bad because I think the vast majority of his hand range we are ahead of.

Hand 3: Really tough spot here, what's his AF? He played it like he flopped tens full or something, but maybe he plays JJ/QQ the same way. I think this is a fold though vs players who take this line, it's almost always a monster.