Also some great resources are available on 1114's website. Awesome powerpoints. Also, Greg Needel has the best powerpoints to train members.
http://www.simbotics.org/workshops
Hope that helps. Other than just finding and researching information like this, its all learning by doing. Go look at your past robots (if you have them still) or go to some off seasons and learn how each robot was built in a step by step fashion. I suggest you start with mechanical design first for this year. Next year if you really want, move into CAD.