ONE LINK: ALL ABOUT CONSCIENTIOUS OBJECTION
This excellent page answers important questions about why conscientious objection is important, what it is, what types of conscientious objection are recognized by law, what other types of conscientious objectors there are, and what obligations a person has to fulfill as a conscientious objector. It also includes a brief worksheet to help prepare for filling out the appropriate legal forms (relevant only in the event of a draft, but useful to have prepared beforehand).
http://www.nisbco.org/What_Do_I.htm