There is a lot of beginner advice and a few guides and some great stickies, but there doesnt seem to be a lot of advice (in sticky or guide form) for the intermediate players. I would like to consider myself in this category (on most days anyways) and would like to offer one small bit of advice that helps me a lot.
You now have the ability to get decent to good reads on most players at your table, and great reads on the dumbasses, this is good. However, don't let your great read on the dumbass blind you to what the others in the hand are doing as dumbasses are by nature easy to read so others probably have the same read as you. Example: Dumbass always pfr from the button, and will push on the flop if checked to him. Great read, remember, others probably have it too. You get KK UTG with the dumbass on the button, great. Limp, he raises as is his custom, the BB reraises the minimum, this should send up red flags, but you dont want to scare out the button so you smooth call, button also calls. Flop comes, BB checks, you check, button pushes, as is his custom. BB calls, which should worry you, but it doesnt because there's no ace on that flop and all you are thinking about is the button. You either call or push over the top, because the button is all in, and realize that the BB has you beat and was doing the same thing that you were trying to do to the button. It hurts, but it happens. In the actual hand that the example above came from, the BB had 66 and was trying to trap the button with it, the flop came K66, and I was then going broke. Had I reraised pf as I should have, the button would probably have folded, but so would the BB. I have now rambled far too much. The moral of the story is, pay attention to what everyone in the hand is doing, and dont focus too much on one player as its usually the other guy in the hand that is gonna destack you. hope this helps someone, if not, oh well.