I will give you so much motivation and so many ideas that it is good for this and this and this, but then when you are lethargic then you say, oh I know it is all good but... You pull the blanket on and then you go back to sleep.
That is why I don’t insist you do morning sadhana only. Whenever it is possible you do it. And if you take a vow to do it for short periods of time then the thing is on track. Okay I am going to do it for ten days from tomorrow; one week sadhana. Then you pray and say if I do sadhana for fifteen days let my job be done. I should get my job done and so I should do fifteen days of sadhana. Then when you do it you will see, the fifteen days for which you had taken a determination to do sadhana, you will do it.
But, if you say forever let me do it, sometimes you don’t even do it the next day. So it is good to do it for a short spell of time you know. That is a way to cultivate the habit, number one.