When we started Abduzeedo we focused a lot on design tutorials, especially Photoshop tutorials. Later we started adding more tools like Illustrator, Pixelmator and others. That was 10 years ago and there weren't many resources where people could find content on those subjects. Nowadays, it's much easier, you can find Photoshop training videos, Illustrator from well-known professionals, including the mighty folks over at Adobe, the mastermind behind the most popular design software in the world. Today, I noticed that they have an amazing Youtube channel called Adobe Creative Cloud and they have already shared some very useful videos with Illustrator and Photoshop tutorials.
The quality of the videos is incredible, they are short, 1 minute walkthroughs explaining interesting techniques to create 3D typography, double exposure effects, composite effects. Everything is really well done. I think they made all the other tutorials sort of obsolete after that. Below you can see the videos.
Illustrator and Photoshop tutorials
For more information and to subscribe for more videos make sure to check out https://www.youtube.com/playlist?list=PLD8AMy73ZVxUuKFHp5BTdVKW37-k6Qhcj