If you want a great food plot, stop in at your local Farm Bureau Co-op and get a couple of soil sample packs. Get those samples done sooner than later and get them in the mail. If your just looking to try a food plot for grins, forget the soil samples and go to one of the recognized seed providers and grab some "no-till" seed. Some great seed choices for the deer might include clover, rape and turnips. Barely, oats, wheat are some others that your FB might suggest. Either way, at least consider things like ph levels, lime, fertilizer, etc.
Now that you know where the farm bureau Co-op is, take some time to sit down with the Agronomy (the science of soil management and crop production) guy/gal and tell them what you have up your sleeve. They know your area well and will be able to best advise you on what plantings work best in your area. Be sure to let them know you will be back to sit down and chat again, once your soil samples come back, and would like to review same with them in order to put together a "soil management plan", specifically for your needs.
In between meetings, you can begin to tear into your plot locations. Start smaller then bigger until you get a good feel for what you are in for. Maybe your soils will need some work or you have a ton of rock to get rid of, or, or, or...
As mentioned above, spraying is usually the way to get things started. If you can mow or bush hog a few days before, all the better. If you do not have access to equipment, and, you can't find a friend with some or hire someone with it, the earlier recommendation to pick up a harrow drag/rake was a good idea. Depending on your soil, the heavy ones can really tear it up and do good work behind a UTV/ATV. After spraying, take a chill pill and give it at least three days, a week is better, before you begin to break ground.
I work some tough ground and I am lucky enough to have the heavier equipment to do it. Having said that, if I did not have that great equipment, and only had my ATV and UTV, there is still some good food plot tow behind gear for those. As mentioned before, it takes a lot longer to get things done. (Obviously...) I can bet you have already done a number of web searches!
If I had my choice of one piece of equipment for my plots, it is my tiller. Granted, it is a PTO driven unit but even atv/utv pull behind models, if used correctly, can make some bad ground good. Next would be the heavy drag.
Be warned, food plots are a great way to have fun, get dirty, can be very rewarding, and, they can be addictive. Have fun, good luck, and keep us posted on your progress.