How much should you save for retirement?

Figuring how much income one needs to enjoy a comfortable retirement is never easy. Many advisors say you need to replace 70 percent of your pre-retirement income. But is that the best gauge? A better method would be to calculate your living expenses before you retire and then figure you will probably be spending less in your golden years. There are also a number of online calculators that can give you an idea of how much you will need in retirement.