during daylight hours take a ride through the parts and make mental notes on the road conditions, and any parts to be cautious of such as potholes, ruts, etc that could sneak up on you in the dark.

also make sure to have your tool kit, and it helps to practice tire changes in dim or no light. you never know if you have to repair a flat in the dark and sucks when you have to do it the first time. i practice in the garage with lights off putting tools in a logical sequence, and discovered no matter how good your lights might be on the bike, having a helmet light really helps instead of clenching the bike light with your teeth. and always check your brakes after you put your wheels back on!