Hey,
So you're playing limit? Everyone knows (most people) that 300 big blinds is a decent bankroll. So try out the limit once your roll grows to 300.
If you drop back a few bucks, then move back down to a comfortable limit and rebuild that roll.
Don't think that you're going to have a 'bad run', if you think like this, then you'll just hit a dry spell sooner than you should... IMHO
.
Cheers,
Gutzz