On my NBME exam I don't remember having any questions about psychotherapy. Here are some high yield topics I remember:
1. Psychopharmacology and side effects
2. Personality D/O
3. Childhood D/O and developmental stages
4. Medical dx that present as psych (e.g. thyroid, organic brain dx, infectious dx, etc)
5. Illegal drugs (overdose and treatment)
6. MDD vs. grief (this one is asked on STEP 2 a lot)
7. Autism, Rhett?s, Asperger's, levels of mental ******ation
8. Psychological tests
9. Dementia and Delirium (be sure to know the diff dx of confusion in elderly)
10. Know what to do with an unconscious pt with no signs of trauma (thiamine, glucose, naloxone)
11. Criteria for Axis I d/o and treatment of choice
12. Ethics
You should also have a pocket version of DSM-IV and know the criteria for Axis I and II d/o