https://www.skillshare.com/classes/Learn-to-Make-Mockups-with-Mockup-Academy-1/1996277037

Digital Mock-ups are a great tool for surface pattern designers and artists — for social media, online sales and client presentations. Mockup Academy will teach you all the skills you need to mock up a huge variety of products in Photoshop. In this first class, I'll go over the basic concept and then show you how easy it is to make your first mockup. As an added bonus, you can download photos used in the class so you can follow along step by step.

This class is perfect for surface/pattern designers, graphic designers and entrepreneurs. You'll need to have a working knowledge of Photoshop, but the instructions are presented very clearly so you shouldn't have any trouble following along.

Once you master the basics in this class, you'll be ready for more Mockup Academy classes that build on this foundation.

Class 2 focuses on mockups with curved surfaces. Think mugs and bowls, lamp shades, popcorn tins, etc.

Class 3 is an introduction to Smart Objects -- a powerful tool for creating multi-use mockups -- so you can do your editing once and then just drop in new art effortlessly again and again. 

Class 4 covers mockups with shiny surfaces and transparent items.

You can use this series as a resource to come back to again and again. So if today you need to mockup a gift bag, but find you need to mockup a pillow or a mug down the road, you can come back and brush up on those techniques whenever you need them.