We have all seen examples of presentations that are not so good.
They have too much text, too many images, or too many colours. Or they have a messy look. Or they are too "full".
Here you can download a very clear example of the basic things to remember to write a good presentation. It belongs to the web of Save the children, a non-profit organization.
1. Slide 1: introduction
2. Just a few clear & simple slides
3. Final slide: conclusion