Turn off the ringer on your landline, or cell phone, off.
Since not all callers are not exempt from the do-not-call list, like charities and such, I found I can have peace and quiet by turning the ringers off.
However, there might be times you want people to call you, like friends, family, and such.
Well, get a Cell Phone, (I use Tracfone) and only tell your friends and family the number, and have them promise not to give it out.
We still get calls, last night, we got a call from the Illinois Fraternal order of police, which, in reality, is a scam artist, because I looked up the number on