Ask HN: How do you discover and keep track of upcoming events?

So I'm building bookmarklet for events, and I've learned that there are plenty of ad-hoc ways people use to stay on top of upcoming events.

The main ones include leaving invites in their inbox. Different calendar layers and subscriptions, and plain old keeping it inside their heads. I wrote down some initial thoughts and how that let to the bookmarklet functionalities.

Would love to see if there are other methods out there that I've missed.

http://blog.tentative.ly/2011/10/why-were-building-tentative-ly/

Thanks!