Help me improve this list of guidelines on spacing

Hi typophiles,
I'm a humble web designer trying to improve my typography skills. At this point I'm particularly concerned with spacing issues. I've read several books and at the moment these are the tips I've been able to gather. I'm hoping some of you might help me improve, correct or refine this list or point me to any relevant literature on the subject. Please excuse me if I get any of the terminology wrong. Like I said, I'm a novice. Also, I'm having to write this on a tablet so I apologize in advance for any mistakes in the text.

Reduce if:
- large body size (+ adjust kerning)
Augment if:
- small body size
- all caps (+ adjust kerning)