This year I finally have a chance to try square foot gardening! A couple of friends of mine did them last Summer, and I really didn't have the yard for it. We've since moved, and have the yard, the resources, and the time to give it a try ourselves! I checked out the book "All New Square Foot Gardening" by Mel Bartholemew from the library. I also found this website http://www.mysquarefootgarden.net/ through an online search, which is a blog that documents one person's experience with her garden, as well as many resources she's developed to plan and organize everything, and lots of input from blog readers.
Some of the benefits to square foot gardening are that there is good soil because you make your own raised bed filled with "Mel's mix", there are fewer weeds and bug problems, and you can grow more plants in a small space.
I built a trellis for it from the book's directions as well, and also purchased PVC pipes for a frame to cover my garden with a sheet of plastic (painting drop cloth) when it hails, which in Colorado, it does frequently in the Summer.
I'm working with my small garden plot on the North end of my yard also, but it's soil is clay with some compost mixed in, and, as I mentioned, it doesn't get as much sun, since it's near some evergreens, our shed, and our back fence. I'm hopeful it will produce something. I'm not investing much cost into it, so it's an experimental year. I am making compost in a bin also, which I'll work into the garden plot as it's ready.
It's not too late or too hard to put together your own garden! I recommend checking out the resources mentioned above for how you can get one started. I hope to post occasional updates on my garden's progress through the Spring and Summer.