'L' Shaped Listening Rooms. What works?

I'm working with an 'L' shaped room. Kitchen and livingroom are all open running 22ft by 22ft by 12ft on the inside of the L. This is a tricky room to work with. Now I'm looking on bringing the sound even further into the room. The bad news is I can't move the speakers further into the room. How do you deal with your L rooms? Thanks in advance, Bluenose