Imaging USA attendees, welcome! I have added some great resources for you here and I will also add any extra notes etc that pertain to my sessions. HDR tutorial and
PhotoshopCAFE, the free resource for photoshop users.
It seems that one of the most requested and under-explained things is using the pen tool in Photoshop. The pen tool is very powerful and accurate. With a little know-how and practice, it will be your ally for the rest of your career. The pen tool creates vector curves and paths. This tutorial shows you how to create paths with the pen tool and provides examples of types of paths you need to know.