Dear Venugopal sir
Your imagination has a great influence on your mind, habits and action.
Visualize yourself performing the task easily, energetically and enthusiastically.
Do so before starting with a task or goal, and also when you feel lazy, or when your mind whispers to you to abandon what you are doing.
2.you need to give yourself the Rest and sleep ,
and also give your body enough exercise and
Breaking a task into several smaller tasks can
solve this problem.
It is important that you focus your mind and
attention on the benefits, not on the difficulties.
Moreover you must train up your brain "I CAN"
BE POSITIVE ALL THE TIMES
All the best