I try really hard, and it seems, well, hard! I have read a few book, and somehow, my mind is often very much racing, like it is too fast to follow.
I find that adding elements of sensory deprivation helps, a lot: a totally dark room, ear-plugs, crawling under the covers. I like to imagine a kind of cocoon.
I tried a flotation/isolation tank once, and that was really quite an amazing experience...after one hour, my body felt less tense than if I had a five one-hour massages, from the world massage master. (whoever that might be!)
I would really like to construct one of these tanks, one day. As it is, I use other means for sensory deprivation, and this helps me meditate, as the noise and sirens and such in the city make me rather jittery, often.