Check out this video before you watch the others below as it explains tuning in with the kundalini yoga mantras.
Also watch another one if you are concerned about sitting cross legged:
ONG NAMO GURU DEV NAMO
AD GURAY NAMEH JUGAD GURAY NAMEH SAT GURAY NAMEH SIRI GURU DEVAY NAMEH
May the long time sun shine upon you, all love surround you, and the pure light within you guide your way on