(Of course, you can also always get passive income by buying-and-holding US Treasuries, which are paying out around 4.2%. The BLS just reported inflation at 3.6%. No one's going to get rich with that level of passive income net of inflation. And according to Shadow Government Statistics, the real rate of inflation you and I are actually experiencing---including at the grocery store checkout line, at the gas pump, and at the doctor's office---not the massaged statistics the government puts out, is actually much higher, perhaps up to 11%. So government bonds could actually be not passive income---however meager---but passive losses.)
Truebill is an app that helps you save money by identifying recurring subscriptions and other bills and helping you cut costs by negotiating better rates and fees. One of their partnerships is with Acradia Power, which has the potential to save you up to 30% on your electric bill. It searches for better power rates in areas where competition is allowed, and it locks in the better prices for you.
Also, I know from my personal experience that when you only do something because you think it’s a money-spinner you end up nearly killing yourself to get the idea over the line.  I remember creating a careers advice site that bored me to tears.  Every word I wrote, hurt a little.  All 200,000+ words!  Do not put yourself through this pain.  I know I won’t ever again.