How to get a best answer?

I've participated in Yahoo answers for some time now and am happy to have the rating privileges that came with level 2. However, I seldom am rewarded best answer no matter how seriously I take a question. I don't care about getting the extra points, I just would like to know that I am truly helping people when I put forth an effort in answering questions. Do I need to be wittier? Should I lean on providing a lot of information or should I be concise? Is it detrimental to not provide a link?