The annual Geminids meteor shower peaks tonight, so if you're willing to brave the cold weather (assuming it's cold where you are) then tonight is your best chance! I wrote a guide to watching meteors showers a while back (it's for a different shower, but the general advice still holds true) that should help, too. I've heard rumors that things will be pretty good tonight for people on the east coast of the U.S. after midnight. If the clouds dissipate tonight I may go for them myself... now that it's finally warmed up to the better side of the freezing point of water around here. And if you do observe, you can join people across the planet and record your observations on Twitter using the hashtag #MeteorWatch. Universe Today has details.