I tend to agree with the other commenters suggesting you just step away from the keyboard for a while. I've been programming for 40 years... it can be addictive, fun, and useful... but there are other and more important things in life. Focus on those. If that advice falls on deaf ears, and you really do want to write code on your time off, then here are some suggestions. I was about to say 'welcome to how we used to…
More to the point though, op says “productive” and there’s more ways to be productive than doing grunt work. Bring books about things you want to learn or improve in your life, not necessarily code. See for example any of the books published by Stripe Press (https://press.stripe.com).