With art, it's also important to simply be passionate about what you're doing. If the desire to create is truly and deeply rooted in your blood and your soul, "sticking to it" becomes a lot easier.

Funny you should mention it; I wrote about that very thing ("not quitting") on our gallery's Steemit account yesterday:

https://steemit.com/art/@reddragonfly/art-and-creativity-did-you-keep-trying-long-enough