There’s a reason sales is one of the highest paid professions. Bringing in new and interested clients is a huge value to local businesses that don’t have time to continually find new clientele. Depending on the amount of business you bring in, you can negotiate fees or revenue splits.
You can also use Rover.com to create a profile for this and be connected with local dog owners. Alternatively, you could go more old-school and create some flyers or business cards to hand out at a local dog park.

Essentially, anything of an administrative nature that you’ve heard them complaining takes too much time is something you could easily get paid to do for them as an under the table job.
Anyone can sell jewelry online, including diamond rings, gold, platinum, and gemstone earrings, bracelets, necklaces, watches, and other valuable jewelry. They’ll even provide you with a GIA-certified appraisal completely free.