• Supplement your income by trying out money making techniques.Robert Kirk/Photodisc/Getty Images
  
  Whether you are looking for a long-term way to supplement your existing income or are in a pinch and need money fast, you can earn money easily in many interesting ways. Though quick money making techniques will not enable you to get rich, many can help you earn a considerable amount of extra income.
  
  

Selling Plasma

• Plasma is the protein-filled liquid component of human blood. Like normal blood cells, plasma regenerates over time in the body, making it safe to donate on a regular basis. In exchange for donating your plasma at a plasma donation center, you will be compensated monetarily for your time. Many plasma centers will allow you to donate once every 48 hours, and will pay you each time you do so. This is an easy way to save lives and earn extra money on a regular basis.
  
  

Selling Online

• If you are in need of money quickly, selling your old, unwanted belonging online is another easy way to make money. You may choose to sell your items through an online auction where potential customers bid for your belongings, or sell them for a flat rate. When selling online, you will receive the money from the buyer and will then be responsible for shipping the items in a timely manner. Selling items online can be a long-term way of making extra money if you sell items that you make or purchase in bulk before selling for profit.
  
  

Online Surveys

• Companies that need feedback about their products or services often offer online surveys. In exchange for taking the time to complete a survey, some companies will pay you monetarily. Sign up with an online survey site that offers money in exchange for participating in surveys. This can help you bring in a small amount of extra money each month.
  
  

Recycle Scrap Metal

• Scrap metal comes from everything from soda cans to animal cages, and salvage yards will pay cash in exchange for your unused metals. You can recycle scrap metal you have sitting around your home in exchange for money, or you can seek out junk yards and trash bins for scrap metal that you can sell. Make sure your local laws allow you to remove trash from public trash bins before taking any scrap metal from them.
  
  

Selling Hair

• If you have long, naturally healthy hair, some wig companies will pay you money in exchange for cutting your hair. These wigs may serve cosmetic purposes or may benefit patients undergoing chemotherapy.
  
  

Art Modeling

• Art colleges often employ models to pose for their life drawing and painting classes, and will pay an hourly wage to participating models. Generally, they need people of all ages and body types to provide the most experience for the students in the class. Call local art colleges in your area and ask if they are in need of any models for their classes. Note that many life drawing classes require nude modeling, so you need to be over the age of 18 and comfortable posing naked.