I don't buy them very often. But, if I won big, I'd travel overseas, start my own consulting company (motivational speaking/juggling/wellness talks), and hire Anthony Gatto to juggle for every birthday party of my daughter's for the next 20 years.
I once found a lottery ticket on the floor at school. I went home to scratch it off. It said that I had one 10,000 dollars. I was so exicited! But I turned the ticket over to read the fine print and it basically said that it was fake!