One of my teachers recommended the following:
Stay "inside" your body. Do not get so carried away as to lose yourself in thoughts. Especially among people, do not "fly away" to see yourself from their perspective. Stay in your body.
Learn to be comfortable. Do not sit or stand in awkward poses. When we are busy or stressed we tend to focus on the issue and put the body in an uncomfortable position. Get used to be comfortable. As a nice side-effect, when you are physically comfortable internally, you look more graceful on the outside too. Stretch a lot. Keep the good balance of weight when on your feet.
Do not suppress bodily urges to the point of getting uncomfortable. If you need to use restroom, do not hold it until you can't wait. If you feel tiredsuffocated staying inside for long time, and know that going outside for a walk will help, go for a walk. Do not ignore your body.
Develop awareness of your abdomen. Many people suppress emotions by blocking the muscles or the sensations in the abdomen. Learn to be aware of the tensions and practice control of abdomen muscles by "pushing" the abdomen out.
Develop awareness of your feet. Oftentimes people tend to get so "heady" as to lose their feet altogether. Having connection with feet is vital for healthy body image. You may have to tap your feet on one another occasionally, until you learn to regain sensitivity.
Finally, learn to be aware of sensations in your solar plexus and any blockages of breathing, especially when you are stressed or nervous.
When practiced for a long time, day after day, all of these combined should pretty much substitute for sitting meditation.