Works for me.
Here goes.

1. Kneel on floor
2. Cross legs at ankles
3. Relax back into a sitting position.
4. Let hands rest naturally on knees
5. Sit up as straight as possible
6. Shut eyes and relax
7. Envisage nothing but darkness.
8. Then a single light source (can be whatever you want it to be).
9. Visualise the darkness as being a black room
10. Allow light source to define walls ceiling and floor.
11. Visualise floor as a still pool
12. Visualise single drops from a point above and in front of the light source.
13. Concentrate hard on getting the form and fall of the drops as near to natural as possible.
14. Create the ripples from the drops. Concentrate hard and create interference patterns from the rebounding ripples if you can.

Keep this up as long as you can. This is quite a difficult exercise and will tire your mind simply because of the level of concentration required.
(porkylips looks better as the sun goes down., Wed 13 May 2009, 10:52, Reply)