This page contains information on schematic design, simulation and PCB design. Links to tutorials, links to software and links to books are provided below.
Orcad capture/Allegro from Cadence Design Inc, Altium Designer(Protel) and Proteus are professional schematic and PCB design software and most of the tutorials are based upon these software. Thus the tutorials are divided according to the software used.
Schematic and PCB Design Tutorials links using different Software:
Schematic and PCB Design Books:
Here is a list of blog post that describes useful books for schematic and PCB design
schematic design phase and PCB design phase that explains a little about the design phases.