islenska ---- Well said.
I am thinking of using tubulars this year so I can get away with really low pressures for some of the courses I do. Every Wednesday during the season we have mock races where we actually make a course with barriers, run ups, ect... It's a great training tool. Last year I started doing single speed mountain bike training rides as well over rough terraine and I think it helped me with bike handling as well as interval work out. It can't hurt to put some running into the training program as well.