Just to add a little to exercise 1. My yoga instructors have always said that whenever doing exercises like a forward bend you should draw the muscles of your abdomen inward, back toward your spine, and hold them there. This helps support your spine and takes some of the strain off your back muscles.
Also tighten the muscles in your thighs to draw up your kneecap to support and protect your knees.
Here are some simple
exercises for your neck and shoulders. Important for all of us who work in front of a computer all day.