Don't forget presence (for asserting your position), rapport (for using small-talk to break the ice during negotiations, and keep both sides happy), empathy (for reading how happy the client is with your work), investigation (to figure out who did what, so you can then apply the accords to their actions), contacts, and discipline (I'd better pass on the second beer so I can get home and study some more).
With all that studying, you probably want to just hit the gym instead of rock-climbing or the like, so you might want a little athletics.