Answer:
I improved my flexibility drastically-I could not even touch my toes, and now I can touch my head to my knees and my palms to the ground-by simply sitting on the ground and reaching for my toes. You can bend your ankles back as far as you want in order to grab your toes, and then attempt to point your toes. This will pull you forwards and bend you down. Hold this position for about 30 seconds.
If you cannot touch your toes when sitting on the ground, bend one leg so that one foot is touching your opposite thigh. Then reach for the other foot. Repeat on both sides. Hold each side for about 30 seconds.
However, if you do not have time to do this, there is an easier way, albeit one that takes slightly longer. Just stop bending your knees to pick things up off the floor. It will be difficult at first, but soon it will become natural.
If you can do both, it will improve your flexibility quickly. I say that if you do try to stretch!