If you find yourself at the point of a complete emotional meltdown, whether it is sadness, anger or what have you, stop and do not say a word. Sit down with a notebook or journal and write down the things that you want to say at that particular point. It will help you express your feelings without causing further conflict.
A great tip for personal development is to always make sure you stand up for your beliefs. If you do not have the guts to stand up for what you believe in, then you will be seen as a weak fool. Do careful research to ensure that your claims are the truth, and the truth can not be denied.
When it comes to personal development make sure that you stand up for what you believe in but that you do not inflict harm on yourself or others in the process. It is important to not be too dominant or powerful because you cannot lead if others are afraid of you.
Make sure that what you believe in is justifiable. You do not have to believe in everything that everyone else believes in, but it is important that you can prove and defend your belief to yourself and others. If you can justify your belief then it means that deep down inside it is the real you.