Check that your screen is connected to your computer, and is working;

Make sure you hide the edit view by pressing "Present". Go into full-screen by pressing "F";

Check that you are presenting from the first slide;

Have a glass of water on hand;

Take a deep breath to calm your nerves.

Remember to allocate some time for the audience to connect to the presentation at menti.com;

You can show detailed voting instructions to the audience clicking on the top bar whist in presentation mode;

Ensure that the audience has enough time to answer your questions. For example, answering an Open-ended question takes more time than a Multiple Choice question;

Spend a couple of minutes after each question going through and commenting on the results;

Hit refresh if something with the presentation seems to be causing an issue.