I would go to Legoland for free, because that place is expensive.
I would get on a bus or a train, and put my feet up without being told off by the guard.
I would set out to find that cd that has been missing from my collection since 2003. I know where it is, but it would mean talking to the girl who has it.
I would teach myself the stuff my attention gave up on before, then learn cloning, then show off all of my new skills to my clones, so that they would think "wow, I got to get me some of that", they would think that I am a worthy leader and word will spread.
I would laugh at the irony that I was the only human able to survive whatever it was that killed the rest of humanity.
I would probably go insane, and command my new people to perform obscure tasks, like playing the trumpet on Wednesdays, but they are no longer called Wednesdays due to me being the only one who knew that, so they would be called Trumpetday. A complete redesign of the elementary foundations of modern civilisation, a new length year, month, week, new names for everything. Haha! The world would be mine!
I would dye myself blue and become Papa Smurf.
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"Think like the whelp, think like the whelp, think like the whelp... " Captain Jack Sparrow
"Hello. My name is Inigo Montoya. You killed my father. Prepare to die." Inigo Montoya