Dave
Active Member
Below is a link to Park Tools' website where they have excellent tutorials on adjustments and tune ups for your bicycle. I have used much of their offerings with great success. They really step you through the process of adjusting derailleurs, cable tension, alignment , etc. That section is especially good. It does help a great deal to have a good repair stand.
http://www.parktool.com/blog/repair-help/categories/derailleur-systems
http://www.parktool.com/blog/repair-help/categories/derailleur-systems