I know its not astronomy, but ...... I was surfing (the net) after a looooong Xmas dinner and a few glasses of milk (?) not looking for anything in particular and came across this page which had me occupied for ages - thought I'd pass it on.
Heaps of info and tips/ideas etc. on using your computer .. have a squizz!
http://www.viewz.com/aol/dijit/dijtip11.shtml