It is important to stay inspired in your daily activities because they can get monotonous. Working at the same job everyday, doing the same hobby everyday, seeing the same people every day, can lead to boredom, irritablity, and depression. Its important you're always evolving and making things more interesting.
For example, I play guitar everyday and in order to learn songs I have to play them over and over and over. Even though I really enjoy playing this can be tedious. So what i like to do is read biographies of my favorite musicians. These books remind me of how much better I can become and inspire me to keep evolving.
A lot of the time people work at jobs that they don't really enjoy and this can be depressing, but you can make it more interesting by staying inspired. If you work in sales you can read books about selling and keep improving at your craft. If you work in customer service you can learn more about how to deal with people. You can also read about people you admire and that can be very inspirational. Whatever it is you're doing, there are always ways to keep it interesting. Also, as a reward for staying inspired you will likely improve your results which could lead to a higher income, more enjoyment and higher self esteem.