Because the alternative is being a bitch.

Every time I don't do something I'm supposed to do, I lose a little bit of my self-respect and confidence. 

It's all downstream from there - maybe I won't ask a girl out, maybe I won't present my new idea at work, maybe I won't ask for a pay raise.

I often ask myself "What will really fail me in life?", "What will really make me miserable and full of regret?", "If I continue on this path, where will I be in 5 years? 10 years?".

I never got into watching Tony Robins and all these con artists that charge insane amounts for seminars.

What does it for me is - what is the fucking alternative. And I've come to the conclusion that the pain of not doing the thing I'm supposed to do far exceeds the pain of doing the thing.