But anyways, two popular techniques, often used together are body relaxation techniques and body awareness techniques.
Relaxation is obvious, usually done before you begin any actual magical work.
Bodily awareness is just focusing on parts of your body, and moving that focus and awareness around to different parts, all around your body. What I think this does is habituate you to let go of your focus on your physical body, since you focus on a part intensely, then let it go completely to focus on something else intensely.
Focus on single toes, different parts of your feet, then the foot as a whole. Then parts of the leg, the leg as a whole. You’ll get used to moving attention away from your physical body, and will be better able to move it away from your physical body as a whole in the same way you moved it away from parts of your body.