i'm new to the poker scene (woot first post) and have trouble with finding the right amount to bet when i hold a good poker hand at preflop. since every situation is different, i guess i'll list out a few situations and would love for any type of constructive input

if you could, please discuss what you would do in early, middle, as well as late position. remember though, this is all preflop

1) if i have a wired middle pair (77), how much should i bet? i want to bet high enough so people fold so they dont improve their hands, but i still want some action

2) two overcards. honestly, i hate these starting hands because if i dont gamble with them, i feel guilty, but if i raise too high, i often end up losing (miss the flop and opponent raises high).

3) high pocket pair. (QQ KK AA). how much should i bet? i especially need help with these hole cards in early position, because i dont know the right sized bet to make, without revealing too much information about my hand

once again, thanks a lot for any input