When I was young, confident, complacent and "it can't happen to me" pilot, I wasn't a perfect steward for a sterile flight deck (sightseeing comments, to my crew members, were my vices).

Reading a cvr transcript back then changed my ways.

About 5000 aircraft (all operations) are airborne over the U.S. at noon on a typical day, 1 crew not observing sterile flight deck procedures below 10,000 msl is one too many!

How many professional crews engage in this behavior?

If you have a crew member that likes to yap in sterile, except for conversations regarding flight, stay quiet.
She/he might get the hint. Then lead by example, when you complete the climb checks after passing 10 or 18k, talk up the non-critical stuff. Descending back through 18 or 10k, shut the non flight stuff off.

Please use this recent cvr transcript as a trigger to reflect on your own behaviors...