The next time that you are asked to make a presentation, how it goes may be based more on how well you prepared than how good of a job you did making the presentation.
What this means for you is that you are going to have to take the time to use the importance of public speaking to master the steps that a speaker has to go through in order to deliver an effective presentation. The good news is that none of these are hard to do.
You just need to be able to remember the steps that you need to take.