QuantiaMD

I don't make too many plugs for other websites, but I've been using QuantiaMD for a while now and I really like it. Designed for clinicians (unfortunately, you need an MD, DO, PA, or NP degree to sign up), it's a community based around the idea of continuing medical education. They have short presentations, interactive cases, practice management reviews, image challenges, and other great 5-10 minute videos. In any case, check it out: QuantiaMD. Full disclosure - this link does count as a referral for me.