I'm going to give you some tips to quite your mind. Hope you'll find this helpful.
Deep Breathing
Almost all esoteric Eastern teachings mention the importance of deep breathing to control one's mind.
I have some breathing exercises here in my BOS that have very detailed instructions on the proper manner of breathing but the trouble is, they are not mine

(just copied it from a friend who is a Yoga teacher) so I'm afraid I cant post it here due to copyright policies. But if you really want, I'll send it to you via PM or e-mail.
Remember that constant, purposeful practice in breathing techniques is another essential condition in stilling your mind. I know it is not something one acquires over night. As one practices daily, one will gain better control of his/her mind and therefore greater confidence.
Pratyahara
After you've done doing some breathing exercises, you may now proceed to achieve pratyahara.
First, sit still in the most comfortable position, close your eyes and just watch your mind think what it wants to think without judging, choosing, evaluating, or reasoning. Let all thoughts, images, problems, issues, memories, reflections and ideas pass through the mind screen and you are just a disinterested audience. Don't fight or resist any thought, whether it's negative or positive. Just stay calm and watch the parade of thoughts before you.
As you continue this practice, you'll find your mind becoming calmer, the thoughts becoming fewer and fewer, until at last, the mind will be under perfect control. This might not happen in a day or two. It takes a great deal of practice to achieve control of the mind, which is more difficult than control of the muscles.
Dharana
After Pratyahara comes Dharana, or concentration, the fixing of the mind on certain points. This isn't yet meditation proper but still a continuation exercise in controlling and stilling the mind. You'll find that after watching your mind calmly for several days or weeks, you'll be in a position to catch one passing idea and to concentrate on it. One recommended practice is to try feeling only, like your hand to the exclusion of the other parts of your body. Another is to concentrate all your thoughts on tip of your nose and let the mind stay there.
After some practice, you'll soon experience some nay wonderful things like peal of bells ringing. Sometimes things will be seen, little orbs or rays of light floating and becoming bigger and bigger.
Please practice these techniques if you have some time and let us know how it works.