Practicing Anjali Mudra (Salutation Seal) is an excellent way to induce a meditative state of awareness. Start your practice sitting in meditation in Anjali Mudra for five minutes. You can also use this hand position in Tadasana prior to beginning the Sun Salutation sequence, as you contemplate the "sun" or light of awareness that the yogis say is resident in your heart.
Here's how to practice it:
Sit comfortably or stand in Tadasana (Mountain Pose). Inhale and bring your palms together. Rest the thumbs lightly on your sternum.
Press your hands firmly but evenly against each other. Make sure that one hand (usually your right hand if you are right-handed, your left if left-handed) doesn't dominate the other. If you find this imbalance, release the dominant hand slightly, but don't increase the pressure of the nondominant hand.
Bow your head slightly, drawing the crease of the neck toward the center of your head. Lift your sternum into your thumbs and lengthen down along the back of the armpits, making the back elbows heavy.