OTF: bet bigger. 20 is less than half pot here. I'd bet at least 25, probably 30-35.
OTT: if you had bet more OTF, you'd now gii. As played, this is about a one third size pot bet. Too small again.
OTr: V has 35 left. Verify for sure that he isn't hiding any big Chios, and go all in if he only has 35. There's 145 in the pot. If you check and he fires, the pot will be 180 so you'll be getting 5 to one on a call, so folding won't be an option. If you bet, you might get called by worse and you deny him the chance to check back a weak Q that would call. If he bought a K, oh well. If his stack was deeper, different story.
Given Vs stack size, you want to gig on the turn here. Bet bigger on the flop. Bigger on the turn. I'd be looking to range my bets from half pot to pot sized, and I like betting slightly bigger on the flop because generally, stacks are too deep to give your opponents immediate pot odds as well as big implied odds.
But, you have an issue that goes beyond the hand. Incorporate into your pre hand routine the following: when the dealer is getting the deck ready and about to deal, look at every players stack. Do this before every hand. You'll forget to do it a lot. But doing this will help you to focus on the hand you're about to play and also give you valuable info about how to play your different opponents based on stacks. As the cards are coming out, get that good look at everybody's stack. I've just started doing this routinely and while it is hard to remember to do it every hand, I like the idea of a prehand routine and have found it very helpful in being focused to okay the hand and then in helping me to adjust my strategy during the course of the hand depending on stack sizes.
