Timothy Sumer

Growing your retirement fund doesn't have to be a scary proposition. » Subscribe to CNBC Make It.: How many of us have heard the advice that we need to invest in the stock market?" self-made millionaire and personal finance guru Ramit Sethi tells CNBC Make It. "The common way we think about investing is sitting in front of four [computer] monitors, watching all these words fly by — 'P/E ratios, asset allocation' — and, then we make some investment. "That's not how you invest." Instead, Sethi, who wrote the book "I Will Teach You to be Rich" and founded GrowthLab.com, a website with advice for entrepreneurs, advises looking into something called a target-date fund for retirement investing. "What you need to do is start off in a really simple way, and all you need to know is the date that you are going to retire," he says. This is how Sethi describes the process of starting a target-date fund: "The computer kno