Some people are unable to sit on the floor. Sitting in a chair is a perfectly acceptable way to practice meditation. You should not feel self-conscious if you must use a chair or think you will never be a “good” meditator. Most important is to keep a straight back and neck. Accessory cushions may be used for comfort and to adjust posture. In this photo, our model is using a square support cushion at the small of the back and a buckwheat support cushion under his feet.