How many of us create every day in journals, on our phones, and in our photo databases? Probably all of us to some degree. How much of it do you let out?
What if you publicly released just a fraction more of what you've been creating for yourself? Would it make the idea of a daily blog or a weekly podcast seem like a less daunting task? I think you'd find you're already doing much of the work.
The real hurdle is overcoming our own preciousness about what we release.