If you want to learn how to make yourself happy and then that means you already know what you want and who you are and who you want to be, if you don't know what you want or who you want to be, check out this post on self discovery questions that you need to ask yourself for your self discovery. You also need to know that to make yourself happy and have a happier life you need to have a positive mindset towards yourself and your life and it is important to remember that only you can make yourself happy and also know that true happiness within your reach only if you are willing to work for it.
