Since Dota 2's alpha tools landed I've been practicing with the editor thoroughly. I want to hit the ground running if/when we ever get a full Source 2 SDK (and a sequel to that game that made them famous, Half... something or other?).
I can't stress how much I love the mesh tools, and the raw power they give back to any level designer who suffered with brush tools 10 years past their use by date.
Anyway, there's a ton of new hotkeys and commands I've been drilling into my brain and I decided I need a cheat sheet I can throw up on my second monitor while practicing, so I made one: It's probably missing a couple of things, so I might add to it when I learn more, but I figure people here might find it useful enough. Share it around if you want, and let me know if I messed up somewhere!