Plan the rest of your talk to be less than the allotted talk time. Do not forget to acknowledge the people or organisations that helped you along the way. Say only what you need to say to get the point across. Do not underestimate the amount of time that it will take to prepare your slides and get them developed. Keep headings short, relevant and informative.
Information slides with fewer words are better.
Chose a simple slide template that is easily viewed under all light conditions and use it for all of your slides and talks. Present data as graphs rather than tables. Keep them super-simple. A picture really does tell a thousand words but only use one if there is a story to convey. Keep the content super-simple.