Well you can look back on the "Frisky Monkey" technique outlined below for a start. But secondly, ease up on yourself. If you're mind is that edgy or your body that jumpy, you haven't done the first step, which is relaxation. In order to truly be successful in your attempts to meditate, you must be relaxed.
You can get a start on that with the Basic Relaxation Technique found on TAOTotem.com. Once you have learned to relax and can command that physical state whether lying on the floor, sitting up or simply being anywhere, you will have a great jump-start to deeper and more successful meditation efforts. You might want to also look at the Basic Meditation Technique also found at TAOTotem.com.
Good luck. And give yourself a break. There's all the time you need and all you need is a little time. When you stop trying to "push the river" you'll find yourself flowing with the river.