Some good advice and pointers in that article. It does not help to just read it though, you have to practice all things listed and take action every day.

One thing that caught my eyes was this: "It is absolutely impossible to know what you're income is going to be weekly, of even daily when you're a professional poker player. "

Because of that I would not go quit my job and go from that to fulltime before I was 100% sure I could survive.