As more Americans shoulder the responsibility of funding their own retirement, many rely increasingly on their 401(k) retirement plans to provide the means to pursue their investment goals. That's because 401(k) plans offer a variety of attractive features that make investing for the future easy and potentially profitable. What is a 401(k) plan? A 401(k) plan is an employee-funded savings plan for retirement. For 2015, a 401(k) plan allows you to contribute up to $18,000 of y