6) Have an Emergency Reserve
While it's not necessary to start stuffing hundred dollar bills under your mattress (the Federal Deposit Insurance Corporation now insures savings and checking accounts at banks and savings&loans for up to $250,000, making banks a perfectly safe place to store your money), having easy access to a store of liquid assets is important. Ideally a "rainy day fund" should amount to several months worth of monthly budget and should be in an accessible account (rather than tied up in a bond, line of credit, etc).
7) Invest in Your Company Retirement Account
Many individuals make the basic mistake of not contributing to their employer-provided retirement account. Almost all companies who provide a retirement plan will match their employees' contributions up until a given threshold (a percent of your annual income). By not putting at least enough money into your retirement account to receive matching funds from your employer, you are essentially agreeing to leave available funds (between 3 to 5 percent of your annual pay) on the table.