I'm using Chrome as my main web browser and added 'xmarks' and 'toomanytabs' to manage my bookmarks and tabs. In addition Google Chrome seems to syncronize and manage my bookmarks if I log into Chrome. As a result there are too many redundant folders in my bookmarks. How can I manage them efficiently? I know that I first need to remove all the redundant bookmark folders and bookmarks. But I don't know what to do next.