"LJ Jump" and "LJ Who"...what are they? They're bookmarks for quickly heading to someone's LJ or profile. Click the LJ Jump bookmark, and it'll prompt you for a user name, then take you to that journal. LJ Who, same thing, but to their profile page. Nifty, huh?
So, how to get them?
1. Make a new bookmark, doesn't matter what you are bookmarking because we'll be changing it in just a moment. If you're using Firefox, move on; if you're using IE, well, smack yourself, then make sure you name this bookmark LJ Jump or whatever you choose.
2. Right-click the new bookmark, choose 'Properties.'
I use these constantly. Now you, too, can be addicted.