There are no guarantees
Enjoy your life as you live and treat yourself along the way.
Eat your dessert first and die a pauper!
As other have posted in this thread - one needs to strike a balance. I've seen retired folk trying to live on little more than Social Security and it sucks. I know people who have saved for retirement and are enjoying themselves and that looks like the way to go to me. I hear people talk about their standard of living going down when they enter retirement. Not me; I am planning for my income to be the same or (if I am lucky) higher in retirement. I live frugally and have a reputation as a tightwad but the only thing I want for now is more time to enjoy my hobbies. I would like to be able to go on another bicycle tour (like Birdwatcher's epic adventure last summer), but I'm not going to quit my job to do it.
