There's also alt-bookmark and alt-gtbookmark to set and jump to bookmarks. You can bind them to ctrl+number keys and alt+number keys (I know they both have alt in the title, but generally you use one of them to set the bookmark, and one to jump to it).
Just in case you guys didn't know.
Edit: Dennis beat me to the punch on this, but I'm leaving my response because it explains a little bit about how it works.