Seo needed for bing is different than google but is the same as yahoo which means they go allot by onpage optimization. So get keywords in your H1, 2 and 3. But don't cram the keywords in becasue that is spammy, make a readable sentance and not a long one either, not H1 anyway, H3 and 2 can be a bit longer. Meta tags are important write a keyword rich title and description but make it readable and attractable to viewers. Your main keywords should be repeated once in all of the above. The first few words of your first paragraph (under the H1) are said to be important too, make em count