Before each presentation should be prepared for at least 1-2 days in order to work out what is important to the practice of speech if you can not remember it's not as well.
Before every presentation should be to prepare at least 1-2 days to work out a good practice to remember the important thing is to say if you don't remember, they say no.
Before the presentations every time it should be prepared for at least 1 - 2 days in order to get the best performance out of the practice of necessary things to say if you do not remember it, he said no, too.