Well, it really depends on the school, the resources you have, the people you work with, etc. First step is just to send an email or better yet, meet with the person in person! If they don't seem to excited, you can back off and try to get ahold of another person. I did research with an OMFS studying craniofacial and maxillofacial tissue anomalies in infants and children as a undergrad. It was not only fun and made me think, but also came with a lasting relationship. I got a strong LOR from the doctor and also expanded my critical thinking skills, problem solving skills, "new-technology-implementation skills", and my ability to work delicately with my hands and micro-machines. Honestly, research was a very fun and rewarding thing, but often times busy.
-Fyz