Need help with poker theory, NL the preflop raise and continuation bet

[john kane]

I play short handed NL $200 sit downs.

Recently ive been thinking about the preflop raise and continuation bet. I like to be more aggressive preflop than the average player mainly when i should have position.
Ive come to the thought that with any preflop hand you want to raise with, say QK (this is short handed, but same may apply to ring games) to aim to keep 2 players in, not 1. In general.

Ive also decided not to continuation bet flops unless i hit. To good players this will become apparent after a while, but we all know we arent up against the most concentrating players online.

The reasoning behind keeping two players in rather than one is it means you getting far better value with two preflop callers on your 32% hit of a pair on the flop.
Although with high pocket pairs, say 10s and above i want to isolate one opponent.

As for the continuation bet, especially if your raise has left it with one other player, it seems a -EV move from the preflop raise.
If you know you are going to bet whether you hit or not, you are effectively not preflop raising to say 3BB, but instead 7-8BB (assuming you bet 4-5BB on the flop to cont. bet). This means you are risking 7-8BB to win on average 4BB. Now in theory the opponent will only hit a pair 32%, but if he has a pocket pair or even overcards he will still likely call (unfortunately due to the nature of some players). So the fold equity is not as good as one would expect. If he then calls you then have the obvious problem of the turn bet. In theory i would base it on how tight my opponent is, whether ive seen him call with overcards or fold to a continuation bet.

Anyway, those have been my trails of thought, and id very much appreciate any other players thoughts on with a hand like QK preflop, how many players you want to see a flop with. And also reasoning for the continuation bet.