Yes, if you haven't already, max Traditional IRAs for both 2016 and 2017. Don't worry, it's not too late for 2016. You get until this April.
That'll get you $5500 for each you and your wife times 2 years. That's $22,000 you can immediately sock away and it comes out of your taxable income. Nice!
After that, you can follow the basic totem pole in the link sisto kindly provided.