how to remove default widgets from sidebar?

I am looking for some help in removing some of the default widgets from my sidebars. I would like to get rid of the rss feed, search, recent posts and calendar from my sidebar. I would also like to remove the blogroll, meta and archive from the bottom of my pages. I have looked at the codex regarding this issue, but there was nothing in there that I hadn’t already tried. Any help would be appreciated.