You may not be aware of that motivation is not something that you can use as you feel like. It has its process and if you go either against this process or even miss any step of its process, then you will do whatever task you set for yourself wrongly.
The fact is that you have the habit of motivating yourself as per your thoughts and emotions and due to this approach of motivation, you tend to make the wrong decisions and you also fail so many times in whatever you do. You even leave so many tasks incomplete and you get bored easily.
This is why it’s very important for you to approach motivation rightly and for this to happen, you will have to learn about the process of motivation.