Often times we have this outlook that we have to work and work only! Now I shouldn't have to say this, BUT I am not advocating stopping working by any means. What I am saying though is, don't use work as an excuse! Let me explain what I mean.
Often times when we are afraid of failure, or we lack confidence in the thing we want to do, we hide behind the job! We say things like, if I had more time, or if I didn't work too much. The key is understanding that the job should fund the dream! If you want to open that business, take everything you don't like about the job and make sure you do the opposite. If you want to write that screenplay, take those stories from work, and boom, you have a storyline!
The key is to stop hiding from what you put on this to really do! "Invest in yourself because when you do, you accomplish dope things."