Share your insights or perspective on the financial matter presented in the input.

How to invest a small guaranteed monthly income?
In my opinion, you can't save too much for retirement. An extra $3120/yr invested at 8% for 30 years would give you $353K more at retirement.  If your "good amount in my 401k" is a hint that you don't want us to go in that direction, then how about saving for the child's college education? 15 years' savings, again at 8% will return $85K, which feels like a low number even in today's dollars, 15 years of college inflation and it won't be much at all.  Not sure why there's guilt around spending it. If one has no debt, good retirement savings level, and no pressing need to save for something else, enjoying one's money is an earned reward.  Even so, if you want a riskless 'investment' just prepay the mortgage. You'll see an effective return of the mortgage rate, 4%(?) or so, vs the .001% banks are paying. Of course, this creates a monthly windfall once the mortgage is paid off, but it buys you time to make this ultimate decision.  In the end, I'd respond that similar to Who can truly afford luxury cars?, one should produce a budget. I don't mean a set of constraints to limit spending in certain categories, but rather, a look back at where the money went last year and even the year before that. What will emerge are the things that are normal, the utility bills, tax bill, mortgage, etc, as well as the discretionary spending. If all your current saving is on track, the investment may be in experiences, not financial products.