In their classic book on making art (or avoiding the process), Art & Fear, David Bayles and Ted Orland outline the merits of using your work as a litmus test for your commitment:
Look at your work and it tells you how it is when you hold back or when you embrace. When you are lazy, your art is lazy; when you hold back, it holds back; when you hesitate, it stands there staring, hands in its pockets. But when you commit, it comes on like blazes.
How are you holding back or embracing your work at the moment? How can you increase your commitment to your project, or accept that you’re flogging a dead horse?