Pruning your own trees can be scary because you want to do it right, and if you do it wrong there is no going back.
A good booklet to help home owners prune their trees is through Green Team Management's Certified Arborist, Ted Smith. This booklet goes beyond the usual structural diagrams and teaches you how a tree grows so you can make those difficult pruning decisions that do not look like the perfect diagrams pictures.
Well illustrated you can find it at
www.diylawntime.blogspot.com or
www.treeseminar.blogspot.com