Assuming that I had enough I would start a fund that gave to people that were struggling to get ahead in this world. Not those with there hand out thinking it is owed to them but those that were trying to make it and life just was not seemingly on their side. I would help many and make sure that they did not know it was me. I wouldn't want thanks just the satisfaction of helping someone without them being aware it was I.
I probably would still work or start a business. Probably a brewery. <br />
If it were a massive win the I'd become a Philanthropist as I believe it a waste to sit on tens of millions whilst deserving people go without. I'd help finance 3rd sector organisations that helped the less fortunate and make sure my close friends were completely self sufficient.
Write. Published little things thus far. More ideas ready to work on.