Plasma Donation Centers
Plasma centers are usually located in urban areas. Many college students use them as an extra source of income. You can donate plasma up to twice a week, and it is pretty easy work.
You can sit there from 45-100 minutes reading or listening to music, you get free cookies and juice, and you don't have to really do anything!
Some place pay for you plasma, and some don't. If there is not a local plasma donation center near you, you can look into donating at a local blood drive.
They usually have at least one plasma machine ready to go. The only thing is that it is a donation, and they do not pay for it. It is simply out of the goodness of your heart, which is great!
To find a local plasma center, you can search the internet and Google. They will surely turn up the most results. There are many plasma donation sites out there as well as information and services. You can also look in the Yellow Pages under 'plasma center' or something related.