Perhaps each person you ask will give you a different answer to a question like this! And many of us have changed our answers over time and with increased experience in the use of Asana.
I like to keep things reasonably simple and easy to maintain, but still organized.
You already have a Podcasts project, so my recommendation would be to use that for your ad-hoc podcast-related tasks rather than putting them elsewhere.
I would be careful about making too many sections because of the way they work in Asana–you generally won’t want to delete sections, and they can’t be archived, so you want to keep them around because the tasks within them maintain their “membership” in the section as useful metadata, even if you mark those tasks complete. So I try only to make sections that I expect will be helpful to always be visible.
In many projects, I put misc., ad-hoc, actionable tasks at the top of the project list (List view is what I almost always use) not in any section at all. When you add a task to the project, it goes there at the top automatically; easy. When you mark it complete, it goes away (with an incomplete filter in place). Below are whatever sections you need for that particular project. And sometimes at the bottom of the project I add a “Reference” section for all non-actionable tasks that relate to this project that I like to keep around, if any.
You can take that with a grain of salt because, as I mentioned, everyone will have a different opinion. Mine is based on 1) twelve years of intensive Asana use for myself and many clients, and 2) a career that included a focus on Information Architecture.
Thanks,
Larry