Expand an entry, and you will see I've included a short pitch for each one to make this a little more useful to you than just a list of links.
Tier 1 ⁂ :: I just about clean house for the podcast/newsletter
Tier 2 ⁑ :: I do my best — Often, this says more about its relevance to me than its quality! These rankings are meant to add value to the reader, not to put things down. 🙂