As you may know, I'm a big fan of daily sketching. I just saw this post on my Facebook feed: Nine Things That Happen When You Carry A Sketchbook With You Nonstop.
The Huffington Post article is written by Priscilla Frank. Lots of good points in this article. Here's one of my favorite:
"You’ll physically observe your own personal style develop."
"It’s hard to know your style or aesthetic from a single image, especially one that feels unnatural or new. But over time, you’ll begin to see the quirks that define your work reveal themselves. The way you cross-hatch to make shadows, or need to fill up an entire page to feel finished, or love to draw every individual strand of hair."
"You’ll watch your style adapt and react.....You’ll begin to notice which parts of your work are malleable and which are a part of your artistic DNA. The little habits and peculiarities will start to operate as a second signature."
I still sketch on a nightly basis. To make it interesting, I usually choose a few art books to use as references.