99% of the time i just toss "junk mail" in the trash can. I literally walk from the mail box towards the trash cans because most snail mail is garbage.

The only time i keep anything is when it has pricing on it. Like for example i got a post card for driveway seal coating. It said "Most driveways $65". I called the guy and had the driveway seal coated two days later.

Maybe put together a couple of packages like "outdoor music" "home theater" with pricing? Someone not really looking might see a price and say to themselves "wow, I can have 4K and an 85" TV for that"?

Otherwise target interior designers, architects & builders. Big jobs come from these guys. Buy them lunch, show them what you got, provide them with an incentives program.