I don't practice regularly due to poor discipline but I have practiced Buddhist mindfulness meditation. it's one of the simplest techniques around. You just sit, crossed legged or on a cushion or stool and follow your breath in and out. When your thoughts wander, as they invariably will, don't hold on to them or follow them just bring your focus back to your breath. A good little book is called The Meditation Bible. There are any number of meditations from all traditions across the globe. You're bound to find something that works for you there.
If you want to talk more about meditation/relaxation please feel free to email me.
sorormystica2002@hotmail.com