If you already understand the use of the voice over scripts and you have them with you, then the next step would be to start practicing your voice using them. This is how you do it. Behave like an actor or actress who needs to express the emotion in the scripts and with the tone. Talk and move as required and try to keep the script in your figure tips so that you can say every word as the write would want. As it gets into your head, repeated it as many times as you can but don’t shout unless that is required from the script. If you feel now you are almost perfecting it, record it and test by giving it to someone who can tell you where to improve. This will make you get the kind of a voice that you have always desired to have. More information about the how to work on your voice is available online and also from those who have succeeded in voice over industries.