Principles in BJJ

I've been off the mats for too long, but that doesn't mean I'm not thinking about BJJ.
Once I get back on the mats, I think I'm going to take the time to refine my game back to the bare bones, basic principles of BJJ. For that, I have to have a definition of the principles. The principles are what BJJ different than other grappling styles so I think its important to identify them. This is for the overall theory behind BJJ, not just sport specific.

1. In a physical confrontation, it is likely to be on the ground so it is important be prepared and well trained for this. (this can be argued but I still feel that it is important to be trained on the ground)
   
2. When on the ground, position is the most important.
   
1. Position sets up attacks
2. Good positioning limits his attack
3. When attacking, use the most efficient means necessary.
1. Submissions are more favorable vs. strikes
1. Chokes are quick and effective and render opponent helpless)
2. Joint locks physically disable a portion of the body, potentially ending the fight
3. Strikes can injure the striker as well (breaking knuckles etc.
2. When doing a submission, use the most powerful part of your body to attack a weaker part of his.
   
1. Never strength vs strength
2. Use your hips whenever possible
3. The weakest points are joints and carotid arteries.

This is a basic outline of the principles of BJJ in my opinion.