The way to personal development is to learn new things. By constantly building on and increasing your bank of knowledge you will grow as a person. You can choose to enter a totally new field and broaden, and you will find that there are new worlds opening up ready to present themselves to you. Or, you choose to dig deeper in a field that you are already familiar with. Then you will be amazed on just how deep one specific area can be, and you will be able to become a specialist and even an expert in one field.
By learning new things you will not only develop and become richer as a person, but also you will benefit from this in your career and business life. The more you learn, and the more you know, the more tasks you will get at work, the more the company will rely on you. Maybe one day they even cannot do without you and your expertise? And with more tasks and more responsibility naturally comes a higher salary and maybe other benefits or rewards. By learning more you will eventually also earn more.
Invest half an hour or more every day to read, study, listen and learn, to get to know something better. A new or already familiar area, it does not matter. But if you pick an area that you are passionate about, that will help you learn quicker and learn more, when choosing an area that really interests you and makes you curious to learn more.
Wish you the best of luck with learning more! Invest time in this and you will be rewarded.
Take care. Namaste.