If you can get access to it, JSTOR.

De Re Militari is an amazing resource for medieval European warfare. There's both primary sources and academic articles hosted on the site, as well as book reviews.

I find myself listening to a lot of podcasts. There's obviously a wide variety of quality and accuracy, but it's great for my commute and the more rote part of my day job.

How do the Washington State users here feel about Historylink? /u/the_alaskan and /u/snapshot52 are the main two I'm thinking of, but if anyone else here is familiar with it, I'm interested in your take.