A lot of people set the goal of saving $1 million for retirement because it's a nice round number. But before you get your mind set on aiming for a$1 million nest egg, you may want to think about whether that'll really be enough money for you -- or whether it's more than what you need to save. What annual income will a $1 million nest egg provide you with? If you're retiring with$1 million in retirement savings, you're obviously not going to be spending all of that money at once -- or at least you sho ...