Christian,
I am finding the d'Ambrossio study manual very useful. You can order it
from Mad River Books at retail@actexmadriver.com. It basically provides
a summary of each chapter of the textbook and exercises with answers.
The exercises in the study manual are more useful than those in the text
book since they are all answered in the study manual, unlike the text
book.
I have not found any seminars offered and have asked the group this
question 2 months ago. Although, I have heard that NEAS will allow us
to copy the old study material produced by them for the seminar offered
last sitting. I don't know where to get a copy though, because I didn't
take the course at the last sitting.