As part of the Diploma, alongside your design skills, you are required to develop appropriate 'technical skills'.
The PDC is really only the beginning of one's education in permaculture design and in all the useful skills that can support better design.
Below are links to more information on the technical tutorials I have chosen to do as part of my diploma pathway and ongoing permaculture education:
Wild Craft course Aug '11
Woodcrafty April 2011
Training for Transition March 2011
Natural Navigation Feb 2011
Sustainable Woodland Management Course
PDC Jordan Oct/Nov 2010