How much is too much?

How much is too much when you spend time on your computer?

I'm parked before mine every day for the greater part of the day.
And the truth is, I get a little nervous to be away for too long. :)

I do aerobics Monday, Wednesday, and Friday for a couple of hours. But really, any time I leave my house, the first thing I do before I do anything else, when I walk back inside ...is check my e-mail. This makes my husband crazy when it's grocery day. "At least put the freezer stuff away, first!!" he says. :-)

Perhaps I need to relax a little and break away from the device that holds me spellbound.
Looking down at my thighs as I write this...I'm thinking perhaps I should spend more time in aerobics. :)
L