This is such awesome advice. I only hope my gf (and me included, because respect and understanding each other's necessary commitment to your respective careers is a two way street) can work through it. At best I will be 7 hours away from her (she's going to PA school), and at worst I'll be roughly 14 hours away (depending on which school I get into).
Either way I think it's key to be able to discipline yourself to switch modes, where and when appropriate.
@Mad Jack you always have the best advice.