Yesterday, I raised a few questions about projects that aren't completed. Here's another one to consider: Do you love what you're doing?
I like knitting, but I haven't started knitting anything else since I finished the infamous Kate scarf. I will ... three people have requested scarves, and I try not to let people down. And, I'll enjoy the process -- and the product. But my creative life would be fine without knitting.
On the other hand, if I couldn't read, write and doodle, I'd be in seriously sad shape. I love reading, writing and doodling. They are part of who I am.
If you're not making progress on a project, remember: It's in your hands. And there's no shame in letting go.