There are primarily two factors which determine how much wealth you will have by the time you reach your golden years: your savings rate and your return. All accumulators should be aware of their savings rate and the implications of small changes. Here is a link to a calculator which shows just that:
I just recently picked up the book Nudge: Improving Decisions About Health, Wealth, and Happiness by Richard Thaler and Cass Sunstein. Both authors are professors at the University of Chicago graduate school. It is a fairly comprehensive look at how we as a society can use the findings of social psychology to nudge ourselves or society as a whole to make better decisions and live a better life. Although I’m not even half way through the book (I want to take my time with this one), there are two things in particular I think are worth sharing: