Last year on all but a memory now, but one of things you can do is to still contribute to your Traditional IRA, Roth IRA, or SEP. You have until April 15 to contribute the remainder of your annual contribution amount.
For your both your traditional or Roth IRA you can contribute $5000 and, if you are 50 or older, you can add an additional $1000. You must have earned income equal to or more than your contribution.
Finally, if you are married you can contribute the maximum amount for you and your spouse – regardless of whether your spouse works as long as you meet the earned income amount.
There are income limits as to whether you can contribute. Check those out first, but take advantage of the April 15 window as long as you are at the step to invest.