A lot of American workers choose to invest in a 401(k) as one of the major ways to collect savings for their retirement. Such an investment is a very valuable financial instrument, thanks to its automated contributions and tax-advantaged status. Investing in a 401k early is a great way to prepare for retirement. Though it is relatively easy to choose your company’s 401(k) plan, it is reported that only a third of Americans understand how it works. If you have no idea yet how to invest through your 401(k), here is about 401k investment strategy by age.