The annual Perseid meteor shower peaks today. Unfortunately the predictions for the best of this peak fall during daylight hours for western hemisphere observers, but the Perseids are known for a reliable and broad peak. Begin watching around 23:00 local time as the radiant rises and meteors begin to appear. Rates of up to 100ZHR are possible if the timing is right, 10-20ZHR for the days before and after peak.
The meteor shower is in addition to the spectacular planetary conjunction going on right now and at it's best tonight. This makes today a must observe night for any serious skywatcher.