I was lucky enough to attend the Forward JS conference in San Francisco in late July. It was fantastic!
The conference occurs twice a year: in the earlier part of the year it is your standard in-person conference, in the later part of the year it is an online conference.
While the content on the conference day was nice, I attended this conference because of the workshops. In fact, if I could have skipped the conference day, I would have. Why? I wanted hands-on, stick-in-my-mind, non-fluff non-excited-for-the-sake-of-being-excited (i.e. the way I assume most conferences are) kind of information.
At a later point, I hope to post specific information from both of these workshops. For now: I could not recommend Forward JS more! (Or the city of San Francisco!)
Edit (Feb 2017): presentation I made of my Learnings from Forward JS Conference (PDF)