Thank you DKNG for share 10 awesome tips!
I used some of them to illustrate one of my favorite sience ficition books and movies.
*Quick Save for Web.
*Using Global Colors.
*Working with Live Corners.
*Giving Depth to Simple Shapes.
*Creating Vector Halftone Patterns.
*Customizing the Blend Tool.
Here is my concept for a book cover of this amazing story, I hope you like it.