Do you need to set an alarm to come out of meditation?

Sri Sri Ravi Shankar: No, usually not because it can be too jarring. But if you keep an intention that I will meditate for 20 minutes or half an hour then your eyes will open. You have an inbuilt clock inside that works with your intention. Have you tried the inner mechanism? For meditation, it is best to sit for 20 minutes in the very beginning, and not longer than that. If you meditation more than that, then when you come out of meditation you will forget where your home is and where your car keys are! So I recommend 20 minutes or half an hour in the beginning, not more.