At first I thought all these things were common sense, but then I realized they're probably just second nature to me because I spent so much time playing WoW =/

At first I thought all these things were common sense, but then I realized they're probably just second nature to me because I spent so much time playing WoW =/ Give them achievements to show off, then make sure there's always one more thing to do/item to get, and some people will play forever...