Social Home Services: Electricians Edition

Most you know I service mostly Home Services businesses, primarily roofers, and now I’ve added Electricians into the mix. 
SO…I’m always trying to find these things:1. A Great Foot-In-The-Door Service to Get New Clients2. A Great New Add-On Service for My Current Clients that Requires Almost NO WORK!3. Something to Sell to Any Electrician Whether or Not They Are My Client for Higher Paying Services!(And many times, they DO come back for other services after seeing this quality service)