What do you want to do sadhana for? The aim should not be the satisfaction of egoism: "I want to be a great yogi; I shall have so much power and with that power I shall establish myself in the world." All such thoughts must be thrown far away.
We start to realize that there are anodynes in life that help us through the day. I don't care if it's a walk in the park, a look out the window, a good bubble bath - whatever. Even a meal you like, or a friend you want to call. That helps us solve all this stuff in our head.