Whenever people cut me off in traffic, park stupidly, or generally be an idiot, I would hit them. On purpose. Hard, but not hard enough to kill them. If they took up two parking spaces, well, I would move their car through sheer brute force. If that required going out and buying myself a brand new tank, I would do it.
Just to make a point.
Other than that, probably something along the lines of private space exploration company, some rather intense research in to cloning and integrating the human nervous system with a computer so I could clone myself then put my consciousness in to other bodies, making myself immortal. Also, I would buy myself a nice, not-too-big mansion in the mountains, next to a lake with lots and lots of room. Actually, I would just buy Wellington Lake [http://maps.google.com/maps?pq=wellington+lake&hl=en&cp=16&gs_id=8&xhr=t&q=wellington+lake+colorado&rlz=1C1CHFX_enUS406US406&bav=on.2,or.r_gc.r_pw.&biw=1920&bih=955&um=1&ie=UTF-8&hq=&hnear=0x876b6af81e6e4f01:0x82e218ea0d780313,Wellington+Lake&gl=us&ei=MZsvTu6uLIyisAP21tQN&sa=X&oi=geocode_result&ct=title&resnum=1&sqi=2&ved=0CBkQ8gEwAA] and build myself a mansion there, open the rest of it to camping again (long story about stupid counties and their tax bullshit to go along with that), and make my living writing books.
Maybe a bit of world domination in there too. You never know.