6 simple steps

Minimize
keep slide count to a minimum to maintain a clear message and to keep the audience attentive.
Clarity
Avoid being fancy by using font style that is easy to read. Make sure it is readable for your audience be it size and font style.
Simplicity
use bullets or short sentences
Visuals
use graphic to help in your presentation.
Consistency
Make your design uniform
Contrast
Use light font on dark background and vice versa.