Do odd jobs around your neighborhood. Mowing lawns, babysitting, raking leaves, snow shoveling, washing cars, and bathing pets are all examples of services that many people are willing to pay someone else to do. If you can do some of these things and you have some spare time, knock on the doors of family members or neighbors you know well, and offer your services.
Websites like Survey Junkie will pay you a decent chunk of change for the low-maintenance, borderline mindless task of completing surveys. Companies want to understand consumers better, and one way they do that is by compensating survey-takers (a.k.a. you). Most surveys pay between $0.50 and $1.25, and many of them take less than 5 minutes to do. You can read our full Survey Junkie review for more info.