Write out the key points you want to address by creating an outline of topics and issues to cover. Use your overview to create note cards, each stating one key point to address during the speech. For example, one card would list underage drinking and driving while another card would list social event drinking and driving.
Gather material to hand out either before or during your speech to help illustrate points made during the speech. The addition of media reports regarding drinking and driving will help make your speech more persuasive as the supplemental data should support your data and findings. If the venue is large, use blown up copies of such articles and position them around the stage as a visual aid. You can also incorporate these articles into a slide presentation to further ensure all in attendance view the information.
Use government statistics throughout your speech to further support the severity of the issue. For example, when talking about the high rate of fatalities in relation to drinking and driving, use statistics such as the CDC's findings that state that one-third of all car crashes resulting in death are due in part to someone driving while intoxicated. Include copies of CDC statistics and research as part of your handouts.
Show car crash photos that were a result of drunk driving. Use an overhead projector, posters or handouts depending on the venue setup and your budget. Make sure to speak about the crashes and point to the pictures to emphasis your points.
Arrange for a guest to appear on stage with you. Contact an anti-drunk driving advocacy group such as Mothers Against Drunk Driving to request the presence of a victim of drunk driving to appear on stage during your speech. You can choose to have the person speak or you may just reference her circumstances and situation to provide a real-world example.