Here are my favorite in-demand side hustles — some can earn you up to $3,000 a month — and where to find them: Selling stock photos. ... Transcribing audio. ... Renting out your car. ... House-sitting, babysitting or pet-sitting. ... Product testing and research studies. ... Mystery shopping. ... Selling unwanted stuff. ... Junk hauling. More items... Aug 10, 2022