SQL Server 2008 Management Studio Intellisense not working?

I'm being driven to insanity trying to figure out why Intellisense just fails to work at all. The server I'm using is local and is 2008, the database is set to 2008 compatibility, Intellisense is on in every menu I can find, and yet no member list will pop up even with a CTRL-J.

Has anyone experienced something like this and found a way to fix it? I really can't bring myself to start work unless I have Intellisense working.