If you don’t already have a job, you can try your luck with a day labor agency in your area such as Labor Works or People Ready. Generally, these jobs are of the low-skill, low-pay variety — construction helper, mover, retail or warehouse work. Arrive early in the morning, and if you’re chosen for a job, you’ll work that same day and receive payment at the end of your shift.
People are always looking to have their cars washed and detailed. You could be a mobile car washer and detailer without having a permanent location. Reach out to people you know or make some flyers and put it in your neighbors' mailboxes. If you want to get serious about it, prop up a one-page website or give out business cards. You can make money quickly doing this.