Off topic now mikemeditate next time start a new thread are u kind.
Can you sit erect with trunk and neck?
Can you avoid being a part with your thoughts and just watch them if they come?
Can you try to extend the gap between the thoughts?
If you have a running mind concentrate where the nose meet the overlip on inhalation and exhalation. you can even think in and out as you breath but dont make it a habit as you will have to stop that at a later point, see it as a help in the start only.
Before meditation it is also good to do some pranayama.
if it is daytime inhale with right first and then exhale with left(evening from left to right). This is one round and repeat. you can start by approx 2 minutes even 5 would be better but dont exert your self in the beginning. Fill the lungs to a comfortable level dont stress your self.
If you have a mala=108 beads you can also do some mantra to keep the mind from wandering hither and thither.
pranayama , mantra and meditation is a better combination than just meditation.
if you start and can sit 5 minutes thats great (i assume your a beginner), and then try to extend it, if your back hurts, feel fatigued by sitting you might need to do some asanas to make your back and stomach stronger.
If you have questions feel free to contact me and good luck with meditation.