I love to curl up with a good book, a cup of hot cocoa (Guittard's makes the BEST, and I can still get it at the employee discount if the right person is working the counter, 2 years after I no longer work for a local gourmet candy company), and my electric blanket on a low setting, so I don't have to bother with the heater and I stay toasty all night (no worries - it's a pretty new blanket, so I won't set the house on fire).
If there's a sweetie involved (which currently there isn't - working on it, though!), curling up together and watching Star Wars or something of the sort always rules.