Theres a couple of things for me, one is the way you put all your favorite bookmarks in the top task bar so you dont need to click on "favorites" and look on a separate menu. Number 2 the extensions, you can add loads of extra stuff like gmail notifier, it sits on one of the bars and tells you when and if you have new email, without opening any site.
oh and if your pc crashes or you have a powercut and you have a webpage open, when you next restart the pc it will offer you to resume from where you left off................... i could keep going