Redundant Entries in Finder "Open with" menu

I had the problem where when right clicking on an file in the Finder and then selecting "Open with" gave me a menu with multiple, redundant entries of suitable applications. E.g., if I right clicked on a Word doc, Word and OpenOffice.org appeared multiple times. This was rather annoying.

I couldn't find the fix but I consulted with a coworker who's a Linux and Mac guru and he found the solution here, along with a number of other good Mac tips. Just in case that page disappears I'm reproducing the fix here. You need to open a Terminal and run the following command:

System/Library/Frameworks/ApplicationServices.framework/\
Frameworks/LaunchServices.framework/Support/lsregister \
-kill -r -domain local -domain system -domain user

This forces LaunchServices to rebuild its database.

Meanwhile, check out the link provided for many other good tips.