Try stretching from a seated position (versus standing, then bending towards the floor). Forget trying to reach your toes -- instead, focus on very gradually stretching your hamstrings. With your legs flat on the ground, lower your torso towards your quads ... feel the stretch. Hold for a 15-20 seconds, then slightly relax the tension. Do it again (several times).
Note that stretching is something that can be done while
watching TV, listening to music, or while just sitting around BS'ing with your friends/family.