In the last tip I mentioned to use the car as a blind. For successful photography from the car use a bean bag to rest your camera. This primarily relates to wildlife photography. If you take landscape photos from the car, get out and use a tripod or rest the bean bag on the hood or roof of the car. 

The bean bag can sit on the window of the car and the camera rests on the bag to keep it steady. The bag I use is a Skimmer Sack. I filled it with pinto beans. I used to use to bird seed in it but the mullet pieces were so small that they would constantly slip out from the zipper and make a mess in my car. 

You can also make a homemade bag using a small duffle bag, or take an old pillowcase and sew the end shut.