How to get good ranking in Bing
Quality Content First
Quality content is the foundation of all search engines (and the only answer you’ll get if you ask Microsoft this very question), so it should be the first thing you focus on when you build your content. Trust me, the rankings will come with it.
Managing Your Backlinks, Tweak Your Titles, Metas, and URLs, The age of your domain, The amount of words per page
All these point help you for good ranking in MSN's Bing..
Best of Luck