First of all, I'm not a professional. I seldom contribute to the RX forum, although I read it regularly. Relying on gambling income only, cannot mix well with a sensible lifestyle. My process is different from most. First & foremost, I make every attempt, to not force any play. I must have solid evidence and strong opinions, to pull the trigger. Because I limit the # of plays, I also limit the time spent handicapping. My routine can be 15-45 minutes. Hours & hours of breaking stuff down will create paralysis by analysis.
After reviewing the lines, I look in depth at all important factors to me. Typically, this is an evaluation of 2-4 games per day. I rarely handicap more games and often less on the daily docket. Because I utilize the eyeball test, I mostly get involved with televised games. If I win or lose, I want to know why, for future reference. This may go against what many pros advise, but it works for me. There are many days when nothing presents itself and I'm OK with that.
When you have control, it can't control you. Absolute discipline will likely lead to more success. This strategy keeps me fresh and sane and I have not experienced the burnout, although it surely exists. As somebody said, winning is a great deodorant for this daily committment. I never feel the need for a lengthy break or season off, because of this approach. FWIW