Reality Acceptance Introduction
Accept reality for what it is, not what you want it to be. People and groups who deny reality do so because reality is against them in their minds. Reality is not their friend. If you dislike how the world is, deny it is that way. If you do not agree with someone else, deny anything they say has validity. We all perceive reality differently and interpret what we perceive differently. To accept reality, you must become a reality detective. We do not perceive reality in simple to understand presentations. Our experiences, senses, and beliefs mask reality. We can only understand reality by gathering the perceptions of others and matching them with our own. Life will present you with many problems to solve in your life. Accepting reality will lead to better outcomes for these problems.
I have broken Reality Acceptance into four different categories. I explain these categories here.
Examining reality is difficult. Most of us have spent a life with beliefs, biases, and a singular point of view about the world. Widening your focus to see the reality of any situation requires accepting a diverse group of perceptions. Reality Acceptance is a skill you must develop. I will help you accept reality, but I will not explain reality. If I claimed to explain reality, you would know I was lying. I will give you the skills to discern reality even when your senses, experiences, and beliefs tell you something different.
Accepting reality is about accepting limitations. If you do not see the limits of something, you are only missing the limits. Everything has limits. You must work with the limits to accomplish what you want in life. People see limits as barriers they must avoid, but they are just the parameters of reality. The possibilities between the limits are much more abundant than people believe. Accomplishing goals within these limits is possible as long as they are realistic. Working with limitations builds your creativity and problem-solving skills. 
An important part of accepting reality is a concept I call Other People Exist. You cannot accept reality without acknowledging the perceptions and experiences of other people. Our personal experiences only allow us a limited view of reality. Even the other people you see regularly only widen your view slightly. If you separate yourself from other people, you are separating yourself from reality. Understanding reality is gathering a diverse number of experiences directly or through other people. Connecting to other people helps us understand them and ourselves better. 
I accept the reality of the world and am a happier person because of it. I see other people whose beliefs, experiences, and biases lead to a miserable life. Nothing about reality is miserable, but their perception only allows them to see negativity in the world. The more you examine reality, the more you will see how few things are inherently negative. Your misery is completely in your head and has nothing to do with reality. Happiness is a choice we must learn to accept. If no one taught you to accept reality or happiness, you never will.