To me, the most important thing is to make a friend or two who has been through a similar situation. Being suddenly rich is obviously different from being poor,

To me, the most important thing is to make a friend or two who has been through a similar situation. Being suddenly rich is obviously different from being poor, but it's also different from being slowly rich. The biggest unique issue is going to be feelings of not "deserving" the wealth. People cope with this in different ways, but the important thing is to acknowledge the feeling and to deal with it in a way that makes sense for you. Those feelings can fester and lead to some very dark places indeed. Deal with them. The other thing is you've almost certainly made the best investment you're ever going to make. You probably won't win like that again. In fact, you'll probably have substantial losses at some point. Don't let yourself feel too smart over this win, and don't feel too dumb over future losses.