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I update my twitter feeds and look through twitter search for things like the 'swine flu' and 'recession economics'.

That, or, I go outside to play. Like I've done today. It's 80+ out and beautiful.
 
I usually read -- got tons of books on non-computer subjects.

Also, 1/700th scale ship kits, mostly of the IJN (Imperial Japanese Navy). It isn't a case of simple assembling, but adding microscopic extras made from photoetched brass. My eyesight is getting on in years, so I won't be able to do this much longer.

Learning cooking, as one cannot survive on alone.
 
ichat, macrumors, facebook, listen to music, watch a movie.. there's a million and one things to do 24/7
 
I forgot to mention Google Street View. I could waste hours strolling down streets in cities far away..
 
Once I'm bored with being online itself, I just try to organize my files and make my Mac as good looking as it really can. (This means both organizing my Desktop and physically cleaning the outside of my MBP)

Other than that, if I am really bored I would simply close it and go outside and enjoy the nice day.
 
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