Doctor Doctor - UFO (Still played at the start of Maiden gigs)
South of Heaven - Slayer (One of the great intros, it builds and builds)
Dead Men Tell No Tales - Motorhead (A short but sweet intro to one of my favourite Motorhead songs)
Its a Long Way to the Top (If you Wanna Rock 'n Roll) - AC/DC
Down Payment Blues - AC/DC
No More No More - Aerosmith
House of Doom - Black Label Society
Sabbath Bloody Sabbath - Black Sabbath
A National Acrobat - Black Sabbath (Best Sabbath song with Ozzy as far as im concerned)
and a few thousand more.