1. Top pair hands get weaker as the the cards keep coming and should usually be played for thin value. A typical line would be to 1/2 pot here check back the turn and call the river (or suck bet it) keeping the pot smallish unless you improve. (small hand small pot)

2. the problem with checking this board is you get no money in once the flush hits. I would lead out for 2/3 the pot as a semi bluff because you improve like almost 50%of the time with these cards. The other benefit is if the flush card comes you can check back the turn and induce a river bluff. (bet on the come with tons of outs)

3. I usually pot here. It looks like a scared Ace and sometimes you'll get a guy to bluff or flat thinking your weak. Im looking to pot pot shove these spots, and I usually bet very quickly, for some reason people think it looks weak like I'm bluffing. (big hand big pot)