I just do my SEO for Google and have noticed I am ranking well in Bing, so more of the same I am recommending!
Bing doesn't seem to care if its an authority site or not - it just likes links. One of its weaknesses. I still see any number of sites that rank due to loads of garbage links - ROS footers in a multi-thousand page cloned garbage directory for instance. Age of domain seems to be a factor. Title tag is extremely important. I am seeing evidence that OBL's can effect ranking, as if who you link to is considered a clue as to what you are about.
check out their webmaster toolbox. I wouldnt get any worried about bing though, unless it will start send some decent traffic.
Use the webmaster tools like all the other search engines. I've focus on google which gives me high rankings in all search engines. In fact i rank higher on bing then google. Just build your links and do all the other stuff you would do for other search engines and next thing you know you'll be ranked.
quite a few people do actually use Bing, i get a fair bit of traffic from it, obviously no where near as much as i get from google, but its worth having decent rankings there