messer21
Rock Star
Silver Level
To be honest I do not remember very well, but I think it was first watching videos and guiding me by pokerstars school; and then I started to read books but I still have much to learn.
I came up in online poker before the era of training sites and coaching and forums so those weren't really options. I learned mostly from just ridiculous amounts of play and then reviewing my hands after sometimes. I read a few books as well.
you can learn a lot from people who plays well.
you can read books about poker and get more info on the game.
you can watch pro poker players tables online.
try ace poker drills, it should help you get used to some situation you may get in to playing online.