I couldn't agree more with the sentiment that - often - stepping outside your comfort zone can lead to good things. However there has to be some reason you want to do it, despite it making you uncomfortable. Otherwise the fact that you're not being yourself will overshadow whatever it is you're trying to achieve.

I made myself go back to university when my first experience was not successful, I'm now on track for a great degree. I am in the process of chasing a few business opportunities, and I'm putting myself in the position of a marketing man. This has already lead to some promising leads. I also tried to be a bit more open minded and non-judgemental, and socialise in ways I didn't previously, and I made some great friends as a result.

Your life is in many ways, very much in your own hands.