Soap: Heavily scented soaps work at repelling deer. Among these are Irish Spring and Zest. What you do is shave the soap in thin slices around your plot. The pros are that it works, but the cons are that you must replace the soap once a week. This gets very old very quick, as well as cost you money every time.
Human Scents: Deer dislike the smell of human scents. One method of spreading your scent around is to urinate all around your site. What you may also choose to do is urinate in a 2 liter soda bottle, and pour it around your plot when you visit. Urine, like the soap, will need to be replaced every week. Another, more cumbersome, yet more efficient solution is to spread human hair around the area. This may be retrieved from a barber shop. In this case, you simply throw fistfuls of hair around the area, and it is said to repel deer for a few weeks, unless rain washes it away.