4. 'Sweat Leaf'
Before the group spent their days getting snowblind, they liked to smoke a little "Sweet Leaf." They really, really liked it. "My life was empty, forever on a down," Ozzy sings. "Until you took me, showed me around/ My life is free now, my life is clear/ I love you sweet leaf, though you can't hear." Right before they recorded it, Tony Iommi took a bit hit of weed. "It bloody choked me," he wrote in his book. "I coughed my head off, they taped that and we used it on the beginning of 'Sweet Leaf.' How appropriate: coughing your way into a song about marijuana. . . and the finest vocal performance of my entire career!"