• Virtual assistant
Payoff: $10 to $25 per hour, depending on the task.
Get hired: Taskrabbit.com.
• Dog walker/pet sitter
Payoff: Walking: $10 to $15 an hour; sitting: $25 to $50 per day.
Get hired: Rover.com.
• Research-study participant
Payoff: $25 to $100 or more per study.
Get hired: Check the websites of universities near you.