You, my friend, are a good good person. Is there a particular area that you feel led to go, somewhere that you have always wanted to go, or are you thinking "I don't care where I go, just gots to go"? I have plenty of friends and family that do missions trips, but they are all through their church.
How confident are you with Global Volunteer Network? I glanced at the page but know nothing about them. If you are interested I might be able to hook you up with an orphanage in Cambodia, a school in Germany, or a village in Sri Lanka. One thing, look into health insurance, there are companies that will insure you for your trip.