Padmasana (Lotus pose):- This is the classic posture that you most often associate with the idea of a meditating Yogi or Buddha. By interlocking your legs you gradually arrest the blood supply to the lower body so that your awareness is not distracted but remains with the central nervous system (spinal cord and brain) and its more subtler parts. Padmasana is one of the most important yogic postures.
Vajrasana (Thunderbolt pose):- Vajrasana is also a classic yoga meditation posture; and the only asana that can be practiced after eating – it in fact promotes digestion. Again if your knees and ankle are paining or are damaged; then avoid Vajrasana.
Sukhasana (Comfortable pose):- Sukhasana is the easiest meditative posture to practice. You must look to master this only if you are unable to master Padmasana or Vajrasana; as it takes longer to slip into meditation in Sukhasana. Also the posture does not automatically straighten your back so you have to put in effort to keep your back straight.