Tips on overcoming math test anxiety, but could apply to any test anxiety. Love the tip about giving yourself difficult practice exams with problems you haven't seen before.
Abstract with a link to the full document on dealing with test anxiety in children and adults. Geared for teachers but lays out different approaches and tips.
Links to studying several different subjects including math, biology, chemistry and physics. Many have the same basic steps. New ones here is are using 2 different texts for studying (get a second one from a library, etc.) and to review the material from class immediately after class and then 8 hours later to increase retention.