Sources for visual material, eg slides. So dress suitably, practice, and cultivate a relaxed and confident manner. Know your audience and tailor your talk to them. Practice beforehand, unless you're accustomed to public speaking. Check the timing to make sure it doesn't run over.
First impressions count.
Add personal experiences and feelings. Print out our leaflets and place them handy where people can see them. Insert your own contact e-mail or phone.