I feel, mind is like a monkey which wavers, making concentration difficult during prayers or chanting. How do I overcome this?
Sri Sri Muralidhara Swamiji:
The elephant cannot keep its trunk stationary. It keeps swaying it always. In order to arrest its movement, the mahout gives it a huge chain to hold on to. Similarly, in order for the mind to concentrate, we have it focus on the divine Name and Form of the Lord. That is the basic principle of idol worship.
Instead of going for a multitude of Names and Forms, it is advisable to stick to one deity and chant one Mantra incessantly. This will bring concentration and one-pointedness. One can thus achieve eternal bliss by merely chanting the Maha Mantra.