Hello mats,
Here are some strategies to get high rank in yahoo,
-Submitting your website to Yahoo! (Since Yahoo! results are powered by Bing, you can submit to Bing webmaster)
-Submit your website to technorati
-Submit your website to Yahoo! directory
-Participate in Yahoo! answers community
-Write keyword rich content
Hope it will help you.
the information you provided is really good, thanks for sharing this nice information to get high rank in yahoo