My dear Wicca friends: Can you tell me how to and what would make an effective wand?

On my journey this February to Sedona I saw many lovely wands. They had a verity of crystal stones on them and were maid of many differing sorts of wood as well. I plan on making my own wand and was hoping that some dear, brilliant soul might be able to guide me in this project. Peace&Love be with you...~M~