How to get better at presentation?

I've had just recently a terrible presentation thing in front of my language class and it made me think about how to enhance my speaking level. English isn't my first language, so that might be one of the reasons of my poor presentation, but I think that if it was only this aspect, I wouldn't be so nervous and I'd do actually a bit better. my English ain't that bad. I wasn't really prepared enough, but how can I get comfortable speaking in front of people without being prepared at all? I know it's possible, since others' speaking was significantly better. any tips?

How to get better at presentation?
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