For those of us truly busy with our day to day activities, wisely investing our scant free time is paramount. We flock to the local pet shelters to give our canine besties baths and belly rubs or serve as volunteers on Habitat for Humanity projects — something I did extensively as a graduate student. Still others would rather spend time participating in other types of community centric partnerships designed to improve public health conditions for millions. Irrespective of how we donate our free time, we all usually do so for three main reasons.