Treasury Inflation Protected Securities (TIPS) can help ensure your savings stay ahead of inflation. However, there are risks, and some may think Gold is a better hedge against inflation. This Bogleheads thread
provides a good comparison of the risks of 10-year TIPS vs. Gold (owned through an ETF).
There was also another good Bogleheads thread
which reviews the question of whether it's better to buy TIPS from TreasuryDirect or from a mutual fund in your brokerage account.