Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Abundance of Cash - What should I do?
Since your 401k/IRA are maxed out and you don't need a 529 for kids, the next step is a plain ol' "Taxable account." The easiest and most hassle-free would be automatic contributions into a Mutual Fund.  Building on poolie's answer, I think mutual funds are much more automatic/hassle-free than ETFs, so in your case (and with your savings rate), just invest in the Investor (or Admiral) shares of VEU and VTI. Other hassle-free options include I-Bonds ($5k/year), and 5-year CDs.