Time Suck

Lately I've been obsessed with the game Diner Dash. This is nothing new...I've played it through a few times, but there are new levels (!) and I'm always a sucker for a time management game (see also: Plants Vs. Zombies, Cake Mania, Hotel Dash, Supermarket Management, Cooking Dash, Megaplex, Wedding Dash, Turbo Subs, etc etc etc -- I've played them all!).

And the ironic thing? While I'm playing these time management games, I'll look up to see that two, three hours have passed in the blink of an eye. That it's 1 am and I need to get up for work the next day.

So...what's the thing you do that makes time fly by? That you can't resist and spend way more time doing than you ever intended?

What's your biggest time suck?