Discipline - Please Help

[DalaiLama]

I have poor discipline when it comes to poker. I play solid poker, but I have a problem when it comes to bank roll management and game selection. Some people can set a goal and play 500 s&gs at the same level. I bounce around and move up depending on confidence and short term results. I can beat the mid and lower games, but I cant resist the urge to move up and gamble a bit. Any suggestions?