Now that Daylight Savings Time has ended for the year, a lot of you who run after work will be running in the dark, at a time when there are lots of cars out there on the roads. If you are running on the road, make sure you are facing traffic, so you can see the cars coming at you. Also, help drivers see you by wearing bright-colored and reflective clothing--things that illuminate when light hits them.
You might also get a clip-on red light that flashes and that you just clip onto your clothing somewhere. If the roads are not well lit and you are afraid you might trip or run into something, you might think about getting yourself a headlamp.