I am not a native English speaker but live in UK for nearly a decade.
When I prepare for a talk I always finish to write a script with all details, starting from: "Good morning.." But the preparation of the script is through key points etc.
I always read it a few times, mainly to control my timing, simply to know if I can squeeze my talk in a designated time. This is a major thing.
When I am going to give a talk, I have my script with me, but rather "in case of disaster" I never read from it. I rather try to interact with an audience.
I think the major point to cover is CONFIDENCE. I gain my confidence through some simple thinking process:
- I know that this what is on my script is known only to myself. The audience have no clue what I should say and if there is anything what I forgot
- The talk is only some very limited time of my life. If I do anything really bad, nobody cares anyway. For them I am a person, who they need to watch for 10, 30 or whatever minutes and they don't really care and remember if I do any mistakes.
- If they already invited me to give a talk, it means that I am some kind of expert and I don't need to afraid.
- I think it is always better to interact, make some joke or even funny mistake than give a bland talk without any emotion.
- I like to have some stress, at least I know I present.
With my strategy in mind I am quite confident and happy with my talks. Sometimes I joke about my pronunciation, grammar or something like that and it is fine.
Also always during the conference I have questions asked. Sometimes I think they are asked because always there are people who think that questions should be asked. (I don't think they care too much about an answer)
EDIT: I'd like to explain why I said "I like to have some stress".
At first I agree with stress in front of an audience. It means if I am going there, I know that I will feel some stress and I am fine with it. Without stress it will be somehow unnatural. Understanding stress gives me more control over my presentation. I also understand that speaker before me had stress and everyone after me will feel it to. I am not a stranger that I am stressed.
Second. Under the stress the presentation goes differently. Sometimes I prepare a talk and when I try to practice, how they say, to a teddy bear, there is no stress involved, this is completely different story.
Third. I think that if I go to present without stress, my audience will see it. They will know that I don't care. If I present my job it is a big deal, I want to tell to the world that it is something what I've done and it matters. I am stressed because my audience is important, because my subject is important, because my image is important. I think that this stress is a positive
At last I like challenge. When I have a presentation and I feel stress I absolutely love the moment when I go of the podium with this sort of triumph feeling, when I am proud of myself. It wouldn't be possible without stress. Talks and presentations are part of my job and I want to know that I do the job, that I achieve something and stress is this part of it.
Taking this approach, understanding stress and agree with it helps to keep stress under control. If you prepare for presentation, prepare for stress to, expect it and agree with it, this is your moment so feel it in full.