Design Books for Inspiration
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"Thoughtless Acts" by Jane Fulton Suri is one of the best. Pages and pages of photos of objects as they are actually used, rather than what they were designed for, gives deep insights into use.
"Design Research" by Brenda Laurel is an exhaustive collection of design methods, which you can pick from to solve almost any specific design problem.
In my opinion, those two books and The Design of Everyday Things are all anyone needs to know in order to be a better interaction designer than 99.9% of professionals.
https://www.amazon.com/Graphic-Idea-Notebook-Treasury-Soluti...
https://www.amazon.com/Grid-Systems-Graphic-Design-Communica...
Lidwell made an interesting presentation of some design heuristics: https://www.youtube.com/watch?v=rdH8Kuku9tA
https://www.amazon.com/American-Wood-Type-1828-1900-Evolutio...
Not just comics, but design, art and media theory. Utterly brilliant.
Even creating graphic beauty or a clear data visualization fall into this category--it's your own aesthetic or intellectual judgement you use, but you always have the user in mind.
No other general principles apart from the need to be creative and open to possibilities. (Creativity is a separate issue.)