I wish Google had a "Try Again" button that would fetch a new set of results based on the algorithm's different set of assumptions about my search intent. The button would come in handy when I am stuck, can't think of another way to rephrase my query, and don't feel like manually combing through pages and pages of search results. Kind of the opposite of "I'm feeling lucky."
(I wonder why all those pages are even there if 94% of people don't ever venture past page 3, and those who do obviously aren't impressed with the first 30 results. On the other hand, I'm also very curious about what site ranked last "of about 1,340,000,000" for "love", but Google won't go past page 80. It's so far down the list it must be filled with hate. Or indifference.)
To go back to the regular button or to revisit the original set of results, I would just empty the search box.