Adobe Illustrator Tutorials
https://www.youtube.com/watch?v=qzE6nZofaI0
https://www.youtube.com/watch?v=qzE6nZofaI0
How To Design Awesome Patterns In Adobe Illustrator
How To Design Awesome Patterns In Adobe Illustrator
A Step By Step Guide To Pattern Design Using Adobe Illustrator
https://www.udemy.com/how-to-create-design-awesome-patterns/
Tutorials: different ones
http://www.digitalartsonline.co.uk/tutorials/