Probably a piece of music. I think it was probably an album by Brian Eno called Another Green World, which is one of his early ‘70s, it’s ambient music, but not the kind of really weird ambient music. There’s an adage that says the music you discover when you are 18, I think it’s 18 is the magic year, is the music that stays with you for the rest of your life. ... Well, I discovered that when I was 18. And I sing the songs of that album in my head all of the time. And I worship Brian Eno.

Easy, easy. An electric toothbrush. I got the Oral-B iO. This changes your life. I mean you can’t go back. You can’t go back.

I’ll give two answers. I bought a new electric teakettle. I used to have all the stovetop kettles. Even though I knew it was vastly better, I underestimated how much better my life would be by having an electric tea kettle so I can have tea actually quickly and more or less on demand with very little fuss.

Probably the biggest impact for something less than $100.00 would be a mole skin diary. I’ve got them all lined up for every year. I’ve had them since 1986. So, in there, in a very tactile way, I have like lists in the back, movies, books. And then, I write in the back the name of the book and then who recommended the book.

So Tim, I wear the SUBPAC Wearable Physical Sound System while I commute on the subway to my office. And sometimes I wear it while I work at my desk. You strap the system to your back and chest, and it lets you feel the vibration of music through your whole body.

Yeah. So in financial markets, I really like this somewhat obscure book called The Aspirational Investor by this guy, Ashvin Chhabra, who runs Jim Simons’ family office. Jim Simons started Renaissance Technologies, which is the dominant quant fund.