The phases of a recently single man (according to Dong and Pacoi)

Phase 1: Mourning period

Amazingly enough I read about this in Mike Gayle's book--Mr. Commitment. The most appropriate length of time to grieve (especially if you've been in a long term relationship) ranges from
1 month to 3 months. This is where the wounds are still raw and you're still grieving over what you had.
In some cases you stop going to work or school and just stay home, locked up in your room crying. Your pillows are normally soaked in tears. Truly the worse stage in a breakup. Memories still continue to haunt you. What you had, what you lost--hours will pass before you notice that you've spent it all staring at the ceiling just remembering everything you once had. You feel like shit.

Phase 2: Healing

Somehow, after a period of depression, the heartbroken young man has found the mental and emotional
strength to move on. Old memories no longer turn him into a pile of blubbering manure. He has turned to friends or other social activities to help in his recovery. He starts going out again-- maybe just to see a movie with some friends or indulges in a night of drinking with his old college buddies. He's still sad but you can see a vast improvement since after the breakup. Maybe he throws himself in his work or studies--anything to pass the time and whatever it takes to make him forget the pain. The good part is you can actually talk about the experience with someone without being reduced to a ball of emotional goo. In time you'll want to seek closure (if it ended rather abruptly) or try to salvage whatever ties you had.

-----will post more on Phase 3 and 4 in a few days.
(these theories were developed after some nights of drinking and reminiscing on past experiences with Dong and Pacoi and should all be taken with a grain of salt since a lot of beer was consumed during those times)