There is one thing that everyone wants and that is to be happy. Being happy is defined differently by everyone but one of the main things that lead to feeling happy is to know that you are growing. The feeling of being more than you are today compared to a year ago in every aspect of your life will give you a sense of joy. This doesn't necessarily mean you are making more money or anything. It just depends on how you define happiness. In order to continually move towards that feeling, you need to continually grow as a person. This is why self improvement is important.
Many people will see self improvement as some type of self help mumbo jumbo. They will think of the self help section of the bookstore or new age hypno-therapy nonsense but that's not what it's about. Self improvement simply means to become better than you used to be. What you choose to focus on doesn't really matter as long as it's something that is important to you. Even setting a goal to get into shape falls into this category.
Whether you want to make more money, get fit, create stronger relationships with other people, become more spiritual, or anything else, the key to personal growth is daily action. Pick something that you can do every day and make it a part of your life. It can be something as simple as reading about your industry for 30 minutes a day or meditating for 20 minutes a day. Whatever it is that you choose to do; it should align with your goals or purpose. Think ahead a year in the future and figure out what areas you would like to have improved on and go from there.
If you don't know where to start, what you can do is simply choose an area of your life that you want to improve. From there, figure out what it is that you want in a year's time and make a plan that will help you get there. You can get ideas on different things such as strategies and insights by reading self improvement articles. Improving yourself is one of the best ways to live a happier, more fulfilled life. Again, the important thing is to do something everyday to help you get closer to where you want to be. Those small actions can add up to big results in a year's time.