I have many favorite resources that I turn to when working on my creations.  Two that I have turned to on more than one occasion are on YouTube:  Scott Sigler and his series "So You Wanna Be A Writer" and Phlearn with the series "30 Days of Photoshop"  The first is great for any writer seeking publication and the tools needed to make writing a career and Phlearn is my go-to channel for questions on Photoshop.