re: Poker & Hands and flops that ruin your bankroll.
1. I feel you have to be very cautious with any pocket pair. Even with AA/KK, although your equity may be big, be careful. I have seen many situations where these high pairs go bust. Ofcourse, reraise preflop... and if someone else does the raising, call or reraise as long as it does not get too high relative to your pair. If you miss the flop, but have the highest pair from your pocket cards (all flop cards are lower), bet strong. Get as many hands out of the way as possible. You may trap the person who has highest pair on the flop or win the pot right there. Then watch out on the turn. If a higher card than your pair comes, it is tricky. Make a small bet, and if raised, this should confirm you are beat, and fold. If the turn is another low card and you still have the highest pair, bet strong again. The opposition will still be in the trap. If the turn pairs with another card in the flop, and your opponent raises, he/she may have made a set and consider folding. Same applies to the river, but there is a lot in the pot by this time that you should call a bet anyway if it is small enough. Also, if anything scary comes up on the board such as 4 suited cards or 4 cards to a straight, fold your pair. They go bust easily.
Although this may not be the perfect play, I do this with any pair i get, betting more and the pair ranking goes higher, and i do perfectly well with it. The win can be big, and the loss not as costly as it could have been.
2. Neglecting anyones pocket cards, if three suited cards come up on the flop, there are 10 outs to 4 suited cards on the board. This means it will come up 10*4 = 40% of the time on the turn or river. 2 out of 5 times you can expect to see it. If you have already made the flush on the flop, make sure you have a very high card and bet on. If you have one card in your pocket that is high and of the suit of this possible flush, also play it, but be aware of your pot odds
. The only thing you have to be afraid of here are possible straight flushes. If you have none of the suit of the possible flush, fold.
3. That situation i really dont know. I would fold becuase you only have 5s...and the turn or river could bring up high cards. If i had a very high pair i would bet strong, but what about possible set of 4s? dont know.