The Monroe Institute has combined art and science and philosophy nicely to master superb focused guided meditation videos.
Here are a few examples of many to pick from:
1. Open Up and Receive
2. Letting Go Into Restful Sleep
3. Free Hemi Sync guided meditation is 30″ long. This is very restful and full of potential
4. Gateway Voyage Introduction Exercise:
Go here to pick more video meditations from the Monroe Institute.