Just cashed out for 2M. What now?
maximumwage: My advice: don't listen to suggestions from random people on the internet (though I like a lot of the suggestions in this thread).  Talk to other successful sellers and a diverse selection of wealthy people and find out what they did with their money.  Also, Gurbaksh Chahal's book "The Dream" has a good overview of the emotions involved in becoming rich, from the perspective of someone who sold his companies for millions of dollars.