The BEST advice for creative endeavors is to simply practice, practice, practice. If writing, write more. If drawing, draw more. If singing, sing more. If it is photography, snaps loads of pictures.
I do not work professionally simply because I don't want what I do in enjoyment to become a job necessity. I could have followed my boss into it full-time as he is, but I don't like every aspect of it in a job related field, nor the pressure of having to do something I enjoy, on demand, when I might lose that joy. I rather do art in my spare time and love it all by itself.