im not going to read the whole thread but im sure you heard this before.
HOBBIES!!!!
seriously, the last time my girl and i split i got into all kinds of stuff.. RC airplanes, fishing, yoga, tennis, etc.
best time ever not being missed and doing what you want. the hardest part is finding out what that is supposed to be.
also, i suggest getting into some kind of spiritual enlightenment. i'm talking zen, meditation, eastern culture, martial arts (including tai chi, kendo, ninjitsu, etc.) and your religious if you are into that. it will return a sense of balance and peace to your life and is the best foundation possible for rebirth of the soul.