Thom Chambers writes about using your publishing platform to detect when your personal growth is stalling:
Your blog is something of a barometer. If you're overflowing with ideas, news, and observations, then the chances are good that you're doing interesting things beyond that blog. You're learning, you're doing exciting work, you're on an adventure.
Whenever you get stuck for a blog post, then, take it as a sign of a bigger malaise.
If you can't find anything interesting to say about what you’re doing, maybe it's because you need to do more interesting stuff.
Another way to get stuck is by fear. You could also think of fear of failure as a barometer for success. Sometimes we just need to get over ourselves and recognize that failure really isn't so bad. Let go of fear and just be.
I think it's also important to note on the flip side that if you can't find anything interesting to say, that's not always a bad thing. Sometimes it's okay to say less.