Being yourself is vital to enhance the level of happiness in your life. However, it is easy to say 'be yourself' but difficult to follow because one has to go deep inside to know themselves in a true sense. Being yourself means respecting your own decision, doing what feels natural to you and staying true to your heart. It is a first step towards realizing your personal as well as professional growth.
To be yourself does not mean, you have to disrespect yourself. Respect others as much as you respect yourself. Learn the good skills and habits from them, but never try to imitate anyone. Each person has different priorities and experiences in life; there is no one else who wants to achieve exactly the same thing as you do. Imitation of others implies that you have lost your dignity, and you do not like something about yourself.
That is why, to be yourself, you should figure out what you like and dislike about yourself. The thing you like is already part of yourself. The thing you dislike about yourself is limitations which are blocking your way to be yourself.
There are some limitations like color, height, etc. that cannot be removed and you will have to live with them. But some limitations like a pimply face, overweight, lack of confidence, hesitation etc. can be removed. But it is also true that you cannot remove it overnight. You have to continually work on it until it gets completely removed.
To conclude, by removing your limitations, which you can remove, you will not only improve your dignity, but also cover up those limitations which cannot be removed. As a result, you will enhance your self-respect, start doing things which you like and above all you will be yourself.