Dr. Daniel Amen in his book Making A Good Brain Great recommends using a form of meditation known as Kirtan Kriya, also known as the SA TA NA MA meditation.

The 12 minute format of Kirtan Kriya that Dr. Amen recommends is a very easy form of meditation for busy people to practice.   Read more by following this link: http://richardeward.com/162/dr-daniel-amen-recommends-kirtan-kriya-the-the-sa-ta-na-ma-meditation/