Organization is a starting point, here is Tuffs University's flowcharting freeware: VUE (Visual Understanding Enviornment) http://vue.tufts.edu/index.cfm
For the rudimentry basics of spaceframe design - 'Racing Sports Car Chassis Design by M Costin and D Phipps' is a classic. The Appendix 111 - Suspension Calculations and Appendix 1 - Chassis Stress Calculations would be valuable - There is also Chapter 1X - basically a tutorial on designing a race car. The general path is:
General specifications - Wheelbase/Track/Engine Location ect> Hub height>Suspension Type> Uprights>Roll Centers>Suspension Design/Geometry ( Drawings - front elevation of front suspension/front elevation of rear suspension - this will basically give you the suspension pickup points/ side view/then design the spaceframe tying the suspension and locating the major components. You can find a used copy of the book on the net, use Google for general ideas on design of components. Brain storm with your team and do several evolutions. There are several FSAE sites and most Universities have websites that would be a good source of knowledge. Just suggestions; everyone has a different workflow.