Help strengthening hammies?
stiff legged deadlifts! I know you said you don't belong to a gym - so maybe find something you can use that's heavy enough.
you hold (in my case) the barbell in front of you, arms down - and slowly bend over (careful to keep your back straight and bend only at the hips). as the weight lowers, you will feel pull on your hamstrings.
here's a pic for ya:
http://www.exrx.net/WeightExercises/...gDeadlift.html
careful not to lock your knees out though - that guy in the pic is outta shape and not the best example - but at least it's animated and will give you an idea.
Good luck!