Try to get reads and plans earlier for your hands. For example, in the first hand you checked the turn. If you checked the turn because you feared he might have a made flush, that's fine, however don't check two streets and then call a large value bet. If that value bet was good enough to call on the river, it should have been good enough for YOU to make on the turn or river. I think you played it too passively. Depending on the opponent, it can be a hard hand to play since the turn puts a flush out there and the river puts a str8 out there, but you're letting your opponent dictate the hand by allowing free cards and then calling their action.

For hand #2, against a 66% VPIP% who goes to showdown half the time, I'd probably have a tough time laying down JJ, however, again, I think you play too passively on the river. You make a $0.50 bet on the turn, which is 38% of the pot. On the river, you make the same numeric value bet of $0.50, but now it's only 21% of the pot. You telegraph weakness. If you're scared you're beat, simply check and if he bets big, you can lay it down or maybe he'll bet a smaller amount that will be harder to fold, but at least you won't lose as much. Had you checked, I doubt he would have bet $1.50 and anything less than a $1.50 that he bet and you called would have been a direct savings to you. OR, make a bigger bet yourself so if you're raised, you know you're beat and still don't lose as much. For example, if you had bet a dollar on the river, that's 43% of the pot and a raise probably means he has a ten or a 2 and you can fold. You only lose that dollar instead of a $1.50. Or, maybe a dollar is a strong enough bet that villain is scared to raise because of the flush. He's not folding, but again, if he doesn't raise, that's more money saved compared to what actually happened. Any money you save or earn adds up a LOT over several hands.

Hand #3 can also be a tough one depending on your opponent, however, against most reasonable villains or ones I don't have a read on, I personally like to check the flop or turn with TPTK because I don't want to potentially lose the majority of my stack with that type of hand. In this case, villain raised pre-flop UTG, which is usually a high indicator of strength. I like the flop bet because he did check and you have a strong hand, but I would have checked the turn for pot control and because I smell something is up. My guess is villain would have led out between $0.50 to $1.00 on the river and we would have probably called and saved anywhere from $0.60 to $1.10 compared to how it played out.

Notice in two of these three hands you were out of position which makes them harder to play.