1) Define yourself. You can't be yourself if you don't know, understand, and accept yourself first. It should be your primary goal to find this out. Try to take time to yourself and contemplate your life and choices. Try to think about what kind of things you would or wouldn't like to do, and act accordingly; finding out through trial and error helps more than you might think it does. You can even take personality tests, but be careful to only take what you want from them and not let them define you. Work on accepting mistakes and choices you've made; they're done and in the past, so there is no use crying over spilled milk.

2) Stop caring about how people perceive you. The fact is, it really doesn't matter. It's impossible to be yourself when you're caught up in wondering "Do they think I'm funny? Does she think I'm fat? Do they think I'm stupid?" To be yourself, you've got to let go of these concerns and just let your behavior flow, with only your consideration of others as a filter — not their consideration of you. Besides, if you change yourself for one person or group, another person or group may not like you, and you could go around in a vicious cycle trying to please people; it's totally pointless in the end, and it leaves you exhausted. However, if someone you trust and respect critiques aspects of who you are, feel free to judge (honestly) whether or not it is accurate instead of accepting or dismissing the critique unconditionally.

3) Be honest and open. What have you got to hide? We're all imperfect, growing, learning human beings. If you feel ashamed or insecure about any aspect of yourself — and you feel that you have to hide those parts of you, whether physically or emotionally — then you have to come to terms with that and learn to convert your so-called flaws into individualistic quirks. Be honest with yourself, but don't beat yourself up; apply this philosophy to others, as well. There is a difference between being critical and being honest; learn to watch the way you say things to yourself and others when being honest.

4) Relax. Stop worrying about the worst that could happen, especially in social situations. So what if you fall flat on your face? Or get spinach stuck in your teeth? Learn to laugh at yourself both when it happens and afterwards. Turn it into a funny story that you can share with others. It lets them know that you're not perfect and makes you feel more at ease, too. It's also an attractive quality for someone to be able to laugh at themselves and not take themselves too seriously!