TBH, there's no guarantee a $1/2 game will play much different to a $1/3 game anyway - standard preflop raises are probably in the order of $10 in either game and it's only costing you $1 extra per round in blinds, so the only real difference is in the starting stacks. Unless you're sitting down at a newly formed table chances are half the table will have more than the maximum in front of them anyway, so even this doesn't end up being a huge issue. If it's a "mistake", I wouldn't say it's a big one.
Hard to tell what actually happened in this hand - I'd say the biggest lesson you can learn from this is to pay very
close attention to what's happening. If you want to analyse a hand later (and it's often a good idea) you need to remember things like position, stack sizes of your opponents, cards on the board, etc. In general though, don't feel you have to bet your draws, especially in a multi-way pot. Sometimes the best thing you can do is take a free card off.
There are worse things you could keep in mind than small hand, small pot, big hand, big pot. Like any generalisation there'll always be exceptions but this was a small hand, and there'd have been nothing wrong in playing a small pot with it.
Again, it's hard to tell from the action here. With K2 though, I'd be even more
likely to just try to take a free card and draw cheaply because you've only got a one-card straight draw, and it's possible you could be drawing thin or dead against better (or even made) straight draws.
It's better that you lost less money on this hand, but you didn't actually have to lose any
money other than your blind.
I've gotta get this straight - you raised preflop with KK, got a caller, then shoved a 799 flop. I take it the villain folded?
Whether you made a mistake on the flop really depends on stack sizes. You do
want to bet in that spot, for a number of reasons. You're very likely ahead, you don't want any weird straight of flush draws to see a cheap turn card, and you're likely to get action from TT-QQ and probably some other weird stuff besides.
If the villain has a lone ace in his hand, he's only about 6% to hit another one on the turn, so that should be the least of your worries. Bet this for value.
With regard to stack sizes there's gotta be what, about $90 in the pot already? If that's about what you've got left in your stack then shoving is fine. If you've got $200 behind, a smaller bet would've been better.
Betting $40 would've been a mistake, because any draws would be getting a good price to call. $60 was probably an alright amount, as a player with AQ/AK might think you're on a dry c-bet and try to shove and steal the pot from you (note: we want
this to happen). As mentioned above though, if betting $60 only left you with $50 or something behind you're better just getting it all in.
A different option in this spot would be going for a check-raise, if you thought the villain was aggressive and likely to bet here. We should be happy to get our whole stack in at this spot, the move we make should be the one most likely to achieve that goal.
You're really the only one who can address your priorities. Suffice it to say that whether or not you'd won some recent pots, if your mind wasn't 100% focussed on the game any more (for whatever reason) then it was a good time to leave.
You got involved with this hand for all the wrong reasons. Don't play something just because you've been "messing up all game". If you're starting to feel that way, just walk away with whatever you have left. It's better that money stays in your pocket than someone else's.
If you want to work on concealing tells
, rather than playing a hand like this, use the money to buy yourself a copy of Read 'em and Reap
by Joe Navarro. The chapter on concealing your tells is fantastic (as is the rest of the book, on reading tells in others).
No big mistake here - it's just a shame the big blind didn't have a hand he could call with. You could try to slowplay occasionally (you have
to stop being so scared of an ace when you have KK) but there's nothing wrong with the raise.
Whether you should chop the blinds is really up to you. If everyone else is doing it sometimes it's easier just to go with the flow (kinda like games with a live straddle) but I'd only do it if everyone
is doing it.