You know, my manic cycles land me in front of my computer screen for hours more than at other times too. My experience of the manic cycle is that it carries much less back lash on the depression side if I refrain from being as active as I feel on the manic. While I'm at the computer, I think i'm channeling the energy back into myself in a theraputic sense. Sure, I feel like a dork with no "life" when I spend a whole day here, but the worse I allow the swings to be, the less "life" I have anyway. Cut yourself a little slack on that one if you can.