Here are two situations which happen from time to time:
First: In early position, six seated table, first level of a tournament. All have about 3000 chips. Blinds at 10/20. I pick up

and raise to 100. As so often happens early in a tournament I get two callers behind me. 330 in the pot.
Flop is

. Obviously I want to price the flushes out of the market. I make a pot sized bet which is flat called by one and the other folds. All ABC so far.
Turn is

. What should I bet now?
Second: In middle position, six seated table, early levels of the tournament. Chip stacks range from 2000-4000, blinds at 20/40. I pick up

and raise to 120. Button and BB call. 380 in the pot.
Flop comes down

. BB pushes all in (say 3500), has me covered. Actually I fold but could he do that with, say, top pair (AJ)?