A couple of modest tips for retirement savings.
401k Match. If your employer matches your 401k contributions, invest as much as possible. This is free money.
Company Stock. Do NOT put your savings into the stock of your employer. Why? Because if the company goes under, you won’t just lose your job – you’ll lose your savings too. (see: Enron)
IRA. IRA stands for Individual Retirement Account. It’s a way to invest money tax-free, and it’s a great deal. Consider opening one and putting money in every year. Here’s the Wikipedia article. Make sure to use a company that does not charge you outrageous fees. I personally use Vanguard.