The point of collaboration is not to work together, but to get something done that we care about. As an extrovert, I need to remember this, because I can mistake cooperation with other people for meaningful work. It can be meaningful, but probably not because of the cooperation but because of the thing we’re trying to accomplish.
Useful collaboration probably starts with the question: what do I want to do?
YoRocko! 
This is good to know. As an introvert, I need to be really concerned and invested in something before I speak out, so collaborating sometimes just feels like having someone draw me out.