The man who thinks he can, and the man who thinks he can't, are both right. Your greatest limitations are not in the world around you - your greatest limitations are inside you, the beliefs you hold about yourself, about who you are and what you can do.
There are several key beliefs that will carry you a long way towards success if you put them into practice.
Every human being is born with the right tools to succeed in life. Other people, accidentally or on purpose, create the conditions for failure. You carry within you all your life exactly what you need to succeed at anything you want. You are exactly smart enough, tall enough, healthy enough, whatever enough.... to go and take what you want from life.
Apply this very simple rule to everything you do. If it is difficult you're not doing it right: find another way of doing it. You will immediately know when you are doing things the right way because it will be easy.
When you fail at something, there is only one meaning to take from it. There is no success without failure. The only thing that failure tells you is that you are not doing it right. Failure says nothing about you, only about how you went about things. After each failure, ask yourself what you learned from it and change how you go about it.
Your mind is programmed to act according to your beliefs. If you believe that the world is full of nice people, you will mostly find nice people. If you believe the world is full of cheats and liars, you will see them everywhere. Your mind filters all incoming signals and matches them to internal models of the world. Your mind will change the signal to match the model. If you think the world is against you, then a part of your mind will prove this in every situation by deleting any incoming information that does not fit with this theory, or will distort it so that its meaning changes. In a sense, you create your own world, your own reality.
So if you want to be a success, then think about success all the time, and your prover will prove you are success by changing your behaviour and your perceptions to suit what your are thinking.
Every behaviour you do, no matter how strange or destructive it is, is actually being done for your benefit. There is no point in blaming other people or even yourself for how you behave. What you need to do is to examine the behaviour, establish what it is trying to do for you, and find a different way of getting the same effect.
Spending time on finding out what underlies a particular problem is seldom as valuable as learning how to prevent it happening and how to deal with the consequences. Focus on the solution to your problem, not its roots. When a forest fire is raging, and planes are dropping water bombs and people are fleeing burning homes, there is no point in trying to find the match that started it.
There is no problem that cannot be broken down into manageable steps. Even if your problem seems daunting, you can make a start on it if you choose to divide the problem into small achievable stages.
Sitting still is the most certain way to waste your life. There is no guarantee that you will achieve what you aim for, but there is an absolute guarantee that you will not achieve anything if you don't try for anything.
Making a start on something, anything, sets in motion a whole universe of change, where resources appear, doors open, links are made. To a large extent, you create your own success. So start now.
The problem with limiting beliefs is that your mind will work tirelessly to make sure that they come true.
People do not easily change their theories, assumptions, expectations and impressions even when evidence contradicts them. Once a mental decision has been made, it tends to persist even in the face of contradictory information. This is especially true if the person has given themself a cause and effect type explanation of how the information they have justifies the belief they hold. The simple process of explaining to yourself or to someone else what you believe about yourself and what can or can't do has the unexpected consequence of making you even more sure of your belief, and makes you more likely to reject any information that discredits that theory, belief or attitude. So challenging a belief and making you justify why you think that way actually affirms that belief and makes it harder to change. In fact studies have shown that when a person is offered information that discredits their beliefs or attitudes, in order to evaluate that information they have to first recall their belief and examine it, which has the effect of reinforcing the belief.
It has been shown that people under stress protect themselves by dimming awareness of new information. This process creates a blind spot, a zone of self deception and blocked attention so that new information just does not register.
This does not mean that self limiting beliefs cannot be changed. It means that before new beliefs can be taken up the person has to put themselves into a receptive state and the new information needs to be presented that exceeds some threshold value. When the new information is sufficiently different or compelling the person will automatically reassess their self limiting beliefs and incorporate the new information to create a different belief.
To change self limiting beliefs you can use