Two more thoughts after tonight's action (1.3k hands).
6. Learn when to attack, not just who to attack.
At NL10, I see lots of villains I know I can stack, and I used to get way too loose and aggressive trying to take them on. Tonight I saw a villain with 40/25/1 stats who plays the flop passively. He opens MP and it folds to my AJs on the button. I glance and see ubernits in the blinds. I think for a minute, decide I'm ahead of about half his open-raising range and rr. He calls. Damn. He checks a dry, 9-high flop, and I fire a pot-sized bet after thinking for about 4 seconds. He folds. A buck fifty for the good guys. In just over 1k hands tonight, I made three moves like that, all with solid reads, all with some value behind, all of which worked. And it was half tonight's profit.
Yes, the donks are out there. Yes, they need to be relieved of their stacks. No, I don't have to play crazy-wild to do it.
7. Two pair is both extremely valuable and extremely vulnerable.
I learned the value part first and started betting 2 pr like a fiend. I learned the vulnerable part later. I'm in the BB and get QJo, check after 4 limpers and the SB completing.Flop is QJ2. Yes, I consider T9 likely, among the 5 weak hands out against me. But there are several hundred other combinations likely, too. I fire a pot-sized bet, get 2 callers. I pot the turn (a K), and get a caller. I check the river (it's a 2), and villain checks. He shows K5 for a slightly better two pair, now that the board has paired on the river.
Still, I'm willing to stack off with 2 pair about 70% of the time at NL10, and that's not changing any time soon. I just know that, as of the flop, my hand is pretty much as strong as it will get without a miracle, and there are literally a dozen ways hands that are behind can catch up. So bet 2 pair HARD on the flop and turn. You're not getting any better hands to fold, usually, but you have to make anyone who's behind pay the price to see another card.