Can ask your audience to turn off their cell phones by asking them to do so at the beginning of your talk
Take out your own cell phone and demonstrate what you want them to do while asking them to turn it off.
Make sure you have a backup ready, especially if it's your event.
Have a backup plan ready just in case something happens to your own equipment. That goes for the projector, as well.
If you find yourself speaking on a multi-speaker stage, be sure ask the sound guy to check the batteries before you talk.
Don't talk so fast that your audience doesn't understand you and don't drop the last part of your speech. It's better to eliminate some of the points then it is to drop the close.
The first way to ward off a disastrous appearance is to avoid obvious reasons speeches bomb.
They include:
Lack of preparation
Lack of skill or technique
Lack of expertise on the subject matter
Technical difficulties or unforeseen circumstances such as poor attendance, weather conditions
Illness or sudden malaise
Being unaware of the dynamics at play when speaking
A speaker willingly gets in front of an audience and delivers rehearsed lines. As such, it’s a voluntary act, created for a stage much like an actor internalizes a script and then replays it with conviction for dramatic effect. Your content might be critically serious but the delivery is theatrical.
Nobody is perfect. Take a look at some possible mistakes you can make and things you can say in response Don’t feel responsible for getting everyone else out safely, but make sure you are safe and know what the situation is before going back to help anyone who needs to be helped.
Go according to the natural flow of the presentation. One slide should be a continuation of the one previous.