1. Automatic goose-plucking machine. I was walking out of work one evening around Christmas and had to cross through a flock of Canada geese on the office park lawn. I thought, "I could just snatch one of these guys, wring his neck, and have him for dinner, if only I had a way to pluck him." It would look like a salad spinner, where you add the goose, attach a lid, then turn a crank. Out comes your plucked goose. Also solves goose overpopulation, so it's good for the environment.
2. Rubber trees. Sell them to commercial real estate developers/contractors. Cheaper than real trees, and less maintenance cost. Just pop them into the ground! We'd also sell accessories, like attachable bird nests or battery-powered hooting owls. Premium customers could buy four "styles" of the same tree, one for each season, and with a support contract we'd swap them out at appropriate times of year.
3. Renewable energy. What is the largest source of untapped energy in the universe? Little children! We'd sell shoes with an integrated battery that recharges as your kids play. The sole of the shoe contains a standard power outlet so you can plug in your TV and watch your shows after the kids are in bed.