Most marketing businesses are just really hard to break into and start making money, but I've found one where people are begging me to sell them the product. It's healthy coffee. Coffee is the second biggest commodity in the world, and everyone wants to be healthy. The first link below is a place to get a free sample, and the second outlines how the business works.
You will have to pay $25 to start the business, but if you can ask people online or offline "Do you drink coffee?" "Would you like to try this healthy coffee?" Then you can make a ton of money with this, and know you are helping people.
This is very easy, but it's a real business - not just some internet scam. You could make a few hundred dollars a month, or turn it into a full time business that would make you three figures or more.
Check it out.
PS My signature isn't showing, so I'll post the links here:
http://cofee.ganohealthycafe.net
http://www.coffeeteamonline.com/lc/debsjava.html