If your career path is going nowhere, resign gracefully and switch careers. Research occupations to find out how much they pay and what their future outlook is (in the U.S., you can find this information in the Bureau of Labor Statistics Occupational Outlook Handbook). Find an occupation that pays well, and invest in the education and/or training to get you that job. Look for employers that offer competitive salaries and ample opportunity for advancement.
Sell blood or donate plasma. Plasma is a component of blood, and the process of extracting it is similar to donating blood: your blood is drawn, the plasma is separated, and the red blood cells are returned to your body. Laws may not technically permit you to sell your plasma, but you can be compensated for your time spent donating. In the United States, you can make about $200 a month by registering with a plasma center near you.
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.