If most people would look at their spending and eliminate the 5% that brings them the least happiness, they would be in substantially better positions financially in the long run. Many people spend 100% of their paychecks and have little to nothing to show for it.
[1] https://www.reddit.com/r/financialindependence/comments/58j8...
Try a quick spreadsheet for yourself. You can assume 5-6 % real returns. Play around with savings rates, GP suggested over 80%, which is more agressive than I've ever heard. Try 60%, which would leave you with 60k disposable, and you'll see things go up very fast in the 10-15 year range.
In fact, MMM shows that it actually all reduces to a really simple calculation, and with that 60 % savings rate, you're 12.5 years away from retirement (if you start at 0 net worth).
http://www.mrmoneymustache.com/2012/01/13/the-shockingly-sim...
Personally I agree with the message about the power of saving to offer financial stability and independence, but I prefer saving reasonably while also trying to find ways to do work that I enjoy instead of saving super aggressively in search of an early retirement from a job I hate.