Focus On Your Goals
It's important to know what you want to get out of your training. Do you want to be more confident? Do you want to create a better presentation? Ask yourself these questions.
Then write your goals down.
Just Do It
Thinking about doing some exercises is not enough. You actually have to go out and do it.
So stop thinking about doing it and start doing it.
Get Feedback
Feedback is an important part of practicing. You will learn a lot faster if you have someone that gives you feedback as to how you are doing and what you should improve.
Be sure to pick someone that gives you genuine feedback. It's not going to help if your friends are telling you that you are doing everything right. Feedback is about criticizing that person.