Summarize:

If you are involved with service work, take the opportunity to talk about volunteering. If you are not already involved in service work, don't worry. You can start a new project, like volunteering at a food bank or nursing home. Your health teacher may have an idea of places you can volunteer. Set up a table in the cafeteria in a central location, or a location that people pass through. Call them over and say, "Hi, can I talk to you about helping out the community?" Talk about your service opportunities. Then finish by saying, "I hope you consider volunteering with me and voting for me for Homecoming King!" If you have a big social circle, don't forget about other social groups. Don't abandon your friends, but sit with new people in the lunchroom and during free periods once or twice a week. Make sure to talk to people you don't usually talk to. It is not necessary to mention your bid for Homecoming King. Listen to what other people have to say, and enjoy getting to know different kinds of people. You may even make new friends. Most schools have a week of school pride leading up to Homecoming. Make sure people know that you love your school by participating in as many of the events as possible. If possible, take on responsibilities when organizing events. Usually there is some element of dressing up on each day of pride week. Coordinate fun or funny outfits with friends and classmates. Encourage as many people as possible to participate in pride week with you. Studies show that people who have central roles in communication between groups are considered more popular. Even if people seem less likable than others, they are considered more popular if they are vital to decision making processes. Try to choose activities that require you to communicate with people one-on-one. Organizing a barbeque or a party is a good way to talk to many people at once. If you are the one organizing it, lots of people will need to come to you for details. Don't be exclusionary. The point is to create a voting base that is as broad as possible.
Convince people that homecoming is not just a popularity contest. Seek out people in multiple social circles or cliques. Take on responsibilities during school pride week. Stay in contact with multiple people and cliques.