Now I dunno if this only works in internet explorer,
but I find it extremely helpful sometimes and doubt many people realize that it's there.
If you click on a hyper link-- like a PSC.URL
it opens in a new window-- so in this new window there is no back button lit up
because it's a fresh window-- BUT
If you hit the backspace on your keyboard while in this window
it will go back to the last hyperlink you hit-
and it will keep going back too all the hyper links
you've opened in this session.
Keep this in mind- your bound to find it very helpful at some point.