[jinfiesto]

Poker is much harder now and it's hard to find tables that will happily pay off nitty play ad infinitum. I'd make a list of concepts you should learn about, but I think it'll be easier for me to make a list of books you should read:

The Mathematics of Poker (Chen and Ankenman)

Applications of No-Limit Poker (Janda)

Expert Heads up No-Limit Hold 'em (Tipton, this one is nice as the author is a Computer Scientist and also has a course on building a solver.)

Professional No Limit-Hold 'em (Flynn, Miller, Mehta)

Finally, you should get a membership to something like Upswing or RIO to help synthesize the information into a useful framework for play. Also, you'll want access to something like PIO or Pokersnowie for analysis of your hands.