Homegrown Gardens has a good tip on how to keep deer out of the garden without having to build a 7-foot tall fence:

Since deer can’t both broad jump and high jump in the same leap, double fencing is a brilliant way to help keep deer out of the garden, Margaret has been a proponent of such deer-proof fencing for as long as she’s used it in her own garden… The key is to build two parallel fences, about four feet tall, and place them about four feet apart. This way, the deer trying to jump into your garden won’t try for fear of getting stuck in the gap. Planting between the fences will create even more of a visual barrier, further discouraging the deer, try a vine or a climbing rose. Prevent the deer from crawling underneath by using a picket fence for the outside barrier, or pin a wire fence to the ground with landscape staples.