Someone said :
I'd love to be able to medidate but I have the concentration span of a gnat.
If I started I'd be thinking about what I was going to have for lunch within five seconds. I
I did meditation, a few different venues with few different groups. Trying to do so on me one is way to difficult. I find it easier being in a group sitting.
What meditation is is mindfulness of the moment. When or if one finds oneself drifting of into sleep or daydreams, then one just brings the attention back on a given point of focus, such as the breath, tips of ones fingers, sounds, etc.,
Even just settling just for 5 seconds, or even one second is a good start if your mindful of what your at.