this wont help you, but i still had trouble with my right and left ubtill well into my teenaged years. I met a freind called louise rigby who told me she used to write l and r on her hands, and if anyone asked she would say it was her initials. Now i always think of louise rigby when i need to remember which is which. I think the idea above is excellent
If we're talking about a very young child, one of the ways to help them learn left and right is to put the letters L and R in the appropriate shoes. I also put half a smiley face with it (so they can match the shoes the right way round). Hope this helps.
I still use the same method as everylittle's little girl. It was taught to me by my Judo tutor when he became exasperated with me always getting it wrong. :-)