I read a post on Rinpoche's blog on Concentration.
http://blog.tsemtulku.com/tsem-tulku-rinpoche/great-lamas-masters/the-perfection-of-concentration-by-geshe-rabten-rinpoche.html
Our mind is like a monkey always moving, always busy. Here are some ways to help generate concentration.
The practice of concentration requires sitting in your proper posture, to which there are seven points:1. Legs crossed and feet resting on the thighs, with soles turned upward. If this causes too much pain, it distracts from concentration. In which case, sit with the left foot tucked under the right thigh and the right foot resting on the left thigh. [.....]
