Andrew Huberman reveals his #1 productivity hack: a separate phone for social media that he keeps in a lockbox. "It's getting very easy to blow past your peers now, just by avoiding being on social media a little bit more." "I took my old phone and I put social media on it. I keep it in this lockbox, which is like a Supermax prison. You can't even code out of it — it has a no-code-out setting. And I leave it in there for about 20+ hours per day. Your productivity will go through the roof."