From time to time, I can't resist to make selfportraits. How to depends on the gear you have available and kind of picture you have in mind. For the picture below, I used a cheap Nikon remote controller, mounted on my steering wheel and camera. It wasn't easy to work with in the beginning, but practice learns you when to press the remote shutter button to get the picture you have in mind. Another option you can use is Stopmotion, whereby you, f.e., make 1 picture every second. This gives you more pictures to choose from and is ideal if you are making pictures of a moving object.