Do more things by yourself.
Stop spending all your time with expats and other travel bloggers while you're on the road. Seriously. You don't need to be suspended in a cloud of familiarity and collegiality while you're traveling. You're not a business traveler who needs to eliminate all excess stimulation in order to get your work done.
You need to actually experience defamiliarization in one or another way in order to come up with anything interesting, and you probably need to be alone to do this. That smart expat who has been living in La Paz or Nairobi or Dhaka forever does indeed have many delicious secrets to share, but he or she also has biases that you might not be able to identify. He or she is as fallible as they come, same as you. No individual source of information is beyond reproach. You should know this.
You should also probably fail from time to time. Failure on the road is more interesting to readers than seamlessly perfect experiences. And you can't fail or even have much of an experience of any kind for that matter if you don't try to do anything at all by yourself.