1. The number one that i've learned in the subject Computer Graphics is to have a book or to read a book about the principles of graphics. You can have many ideas if you read something about computer graphics, like color theory or something about the terms.
2. Photoshop Techniques. Well this is important to me, as a practitioner for this profession have to know what are behind some designs or something about the concept in designing.
3. Rasterbator. In this technique, you can have a big poster that creates an illusion that the image on it is a big. An illusion that the poster is expensive but actually small in price.
4. Computer Technical Terms. The 64 bit or 32 bit graphics terms, i learned so much about it, like the right RAM on your computer, or in general the requirements of the computer on the applications you are using.
5. Web Design Techniques. Actually i am absent when our instructor taught this but in other days that our instructor taught us, the principles in the way on how the web design formulate .