Bassy plays a LOT, so when she posts this thread will become way more useful.
That said, I used to play pretty frequently, but haven't at all since I went to Vegas last June.
My advice:
-Get a book. They're kind of expensive, but once you pull down a pot using the knowledge from that, it's already paid for itself. I can't recommend Sklansky's Theory of Poker enough.
-Listen to Kenny Rogers. If you think you're not playing up to form for some reason, walk away. When I was in Vegas, I usually played for about 5-6 hours at a time. You get really tired in that time, especially when they're feeding you free beer all night long. Don't be afraid to get up and take a walk. Your stuff will still be there; don't worry.
-Again, listen to Kenny Rogers. Know when to fold. Just because you managed to catch 2 runners 1 time to make your 58o into something special doesn't mean it'll happen again anytime soon. At a home game I was running, I left the table for a few minutes to take a phone call. My mom sat in while I was gone. She called on 23o and eventually made a full house out of it, but in the long run it's not worth it to stay in for the once or twice a month that'll hit
-Play a lot, because I haven't been and I miss it