Ideal way to terminate gracefully

With the scripts running , what would be a graceful way to terminate and exit ?
Here is what i am doing -
1. Upon Keyboard Interrupt - disconnect device and then device.power_off().
Any thing else I may be missing. Didnt find a suitable example for the exit sequence yet , but any refrence to read up will help.

BTW irrespective of what reason i give for the disconnect device , the disconnect reason is always 22 .