Make sure you take the time to build a bankroll to support the stakes you are planing on playing. Number 2 get software to truly understand Variance and risk (CVCX or BJA). No running count mistakes, get deck estimation down to 1 deck divisors, then get it down to half deck divisors, know basic strategy perfectly then start learning deviations (illustrious 18) then keep adding on more and more.
Number 1 is definitely make sure you have a solid game.