I'm also intrigued by the possibilities suggested by Nathan Lowell's "Talking On My Morning Walk" podcast -- well, it's something like that, not looking at it right now. He basically kicks on his phone to record, takes his morning walk out and back and talks "stream of consciousness" for as long as that takes, maybe 20-30 minutes. No intro or outro music, just a couple of habitual phrases at the beginning and end.
I don't think I'd do it exactly that way. I'd keep my audio "branding" pieces at the beginning and end, cause that's how I roll. Don't know if I'd do all stream of consciousness talk. But his way does have the attraction of producing a continuing flow of content.
Quality is important, and keeping stuff interesting is, too. But what keeps a blog or podcast lively is in large measure more content. New stuff, daily, weekly, monthly, whatever you can manage. Even if not always flawless, at least it's there.
The long tail is vital, of course. Past posts give interested audience something to browse through, and in blogs in particular it gives more targets for search. I find the use-more-keywords stuff rather distasteful. Should talk about your topic, if you do that the keywords will probably be there anyway. It's profoundly disappointing to do a search, grab a result and find it's all keywords and no useful content.
So anyway, recording on either the Fire or my new Moto E phone. Might be fun. Awfully cold out there to do what Nate does, with the walking around. Though I gather he's in Colorado, plenty cold there... The main attraction is, I often have ideas wander through my brain (there goes one now, about natural gas). And I tend to talk to myself when those come up. So I'm essentially producing podcast content all the time, but it never gets podcast. And the podcasts I do produce are infrequent, because of my rather fiddly work process. I tend to type out all I want to say, then record it, then edit it (I'm a picky editor), wrap it in music and cover art, and then post it. Training myself to just put it out there with minimal editing will result in more Stuff, and probably no less valuable anyway. Same content, just out now, not someday real soon now.
That's all pretty Inside Baseball. But it helps me to write it out, so I can stare at it and decide if it all makes sense. Having to spell it out in depth forces me to consider the idea thoroughly. But that argues against the ramble into a mike idea. If I don't write it out, I won't know if it's a good idea till I've already added it to my podcast feed.