Building a good cardiovascular base is a great start to prepare for the season. Going on a 3 mile run is a excellent way to begin. The 5K course on the High School Campus is excellent for training. Build up to a 5K (3.1 mile) run, without stopping, 2-3 times a week.
You can map out a good 3 mile course around where you live, or the course on campus (pictured below) is a great place to train. Rotate your phone sideways to see the entire course on your mobile phone.