I haven't been playing NL for that long, but I've come to realize that everything else in NL stems from this simple rule:
Make them chase you to beat you
If you make people chase you, and you don't chase, you'll cream 'em. Make them draw to flushes or straights with their whole stack. Make them pay to try to hit their ace after the flop. If they do, so be it. It's only gonna make them want to do it more. With this in mind everything at the NL table should seem obvious.