It is crucial for you to understand what meditation is. It is not some special posture, and it's not just a set of mental exercises. Meditation is the cultivation of mindfulness and the application of that mindfulness once cultivated. You do not have to sit to meditate. You can meditate while washing the dishes. You can meditate in the shower, or roller skating, or typing letters. Meditation is awareness, and it must be applied to each and every activity of one's life. This isn't easy.