Nothing, just chop of the good bushy part and grow it independently. The leggy stub if long enough can be cut and grown as a cutting while the bottom part left will sprout with more cute babies
. Depends upon how many you want.
Broken leaves can be dumped on the soil and unless you plan to open a nursery, few should sprout. If you are planning to open a nursery then there are more complications involved.
I know I am heartless and they are out there in the cold
Regards,
Arif.
