Here's a new video tutorial from me, this tutorial will learn you how to create a custom jersey, it'll learn you the basic photoshop tricks so you could combine them in your work.
Here are some usefull shortcuts, that you'll see in the videos too:
Ctrl+c - copy
Ctrl+x - cut
Ctrl+v - paste
Ctrl+t - transform
Ctrl+s - save
Ctrl+z - Undo
Download links: