Ask with genuine humility for the students to vote for you.
Ask for a constructive criticism, even if it hurts. This is important if you go to a school with a big population. What tone or choice of vocabulary is best suited to them? Their vote is important for you to win the election.
Lead with your strongest idea first. Include your campaign slogan in your opening and conclusion Keep your style conversational rather than overly formal Use smaller rather than large sentences Use active rather than passive words.
Ask the students, teachers, personnel on what areas that you should be improved. And the specific qualifications you can think of related to the position you strive for. Check this page on using action verbs. From the time I was five years old, I've been taking guitar lessons.
That is on of my secret bonus hints! Your audience Who are you speaking to?