I once almost bustoed when I didn´t look at the cashier for weeks and was playing the insanely swingy deep tables at AP. It´s not really about checking the cashier, it´s something else. Even tho most poker players on this forum beat the vast majority of people when it comes to understanding uncertainty and random events we are still a country mile away from fully realizing how much of our results is owed to stochastic processes underlying the game of poker. Check your cashier as often as you like and start instead reading some. Nassim Nicolas Taleb´s "Fooled by Randomness" and "The Black Swan" are a great start and very enjoyable books either way.

And whatever you do, good luck on this operation and achieving your goals