There a a few things that you should remember when shooting headshots.
Try and use either a 50mm or 85mm lens. This is going to give you the optimal focal length and frame you will need when doing headshots or portraits.
Using a softer light can give your subject a nice smooth skin texture that will help tremendously with touch-ups when you are editing.
It does not matter what the background in your headshots looks like. You never want to draw focus away from your subjects face with a busy scenery in the background.