Millionaire who saved 70% of his income and retired at 35: 'We should all live by these 6 basic principles'

The article from the above link tells the story of a young couple who decided that it was more important to build wealth and retire young than to live a "normal" life (a life like most of their friends and family). They pretty much gave up eating out and spending on non-essentials, even while doing all they could to increase their income. For several years they lived off 30% of what they brought in and saved the rest.

At 35, they have more than $1,000,000 in investments and are retiring. And traveling. And being their own boss.

What do you think about this concept? Would you rather have it now, or have it later? What are you willing to do or give up or change to insure financial stability for yourself and your family?