Find a hobby like everyone else. People tend gardens, even though they are just inefficiently ran agricultural setups. People play chess even though nearly all of them won't be able to beat the best AI. People will still draw for the enjoyment of the act of drawing. People will still write/type/voice their thoughts onto some medium. People will be with friends and family. Hell, I'd be happy just being left to ruminate with my own thoughts a lot of the time.

Machines can replace our need to produce our material goods and services, but I don't see how they could ever replace our need to express or relate.