I would spend the first month just enjoying my family, playing with my kids all day, taking my wife on dates. When they got tired of me I would spend a good week blogging, and reading stuff. I would then dream up an application so large and outside human possibility. I would spend 7 solid on days on that before I realized I was an idiot for even imagining it.

Then I would get super sucked into an anime series and spend a week getting through that. After watching tv for a week I would make a profound realization about my health and starting eating right and exercising regularly. I would definitely need a new pair of shoes, a water bottle, and a fitbit. I would spend the next two weeks working out really hard, and starting to feel great would me remind to be productive.

I would then scope a really clever Sass business that will generate monthly revenue so that I would never have to work again, and could be my own boss.

I would spend the rest of my time trying to get this up, working, and generating revenue.

Also guitar, I would definitely learn guitar for real this time.