TIPS FOR NON NATIVE SPEAKERS:

• You should speak slowly while presenting your topic this will help the audience to understand you views.
• If you face any kind of problem while communicating, you should ask for help instead standing on one problem.
• Preparing notes can be the best helper for both native and non native speakers, this dampen your nervousness.
• While giving speech you can also use visual support, or a picture.
• Work on your vocabulary as much as you can.

http://speakingcenter.uncg.edu/resources/tipsheets/activelistening/ListeningintheWorkplace.pdf