how to believe in yourself ?

As a matter of fact the statement "believing in yourself" it's a power in its ownself. It may take some time but it certainly will give you outcomes. Competing with others just a despair but competing with yourself comes with a gratuity " when you'll look back you might notice that how we're you before you started believing in yourself and now where are you in the instance " For example,  jeff bezoz the co founder of Amazon who was just merely a ordinary person with same 24 hours is now the richest person on the planet. Just by believing in yourself you can acquire what you always craved. 

Never doubt yourself or limit yourself to some tier, always try to lift up more than you performed before. For trial, one day go for a run for 20 minutes and each day increase 5 minutes per day and you will notice that from 20 minutes now you can run for like 40 minutes in a month. 

There are certain principles you need to follow for the development of your inner self like:-

Never ever doubt yourself 

Doubting yourself is like forbidding yourself to the way you exist. The more you doubt the more you proceed to be in the dark shadows and the boundaries you created by yourself, guess what if you believe instead of doubting yourself you may see the things more positively to your environment. Why to limit when you can be the spark of your own light.

Trust yourself you can do better and can be the best edition.

 "We all have the ability to come from nothing to something."

Try to Execute your goals not just daydream.

Yeah I agreed dreaming big is best  but we forget one simple rule that we shouldn't have to break is trying to implement in reality, you have a idol whom you believe most and want to become like him okay then just snap out yourself from the dreams and start working towards it . make to-do-list,plans to accomplish your short term and big goals appropriately. 

Even if you didn't reach where you wanted to be but believe me the way you choose will be taking you far from where you started . You'll be like is that me? Pardon that but it actually works like that.

Never worry about failure or downfall

Give your 100% percent to everything you commence, even if you fall you should be like okay so what? I gave my best and I learned something, change your thinking in more of optimism pitch. The great Thomas alva edison failed over 1000 times just to pick right filament for his bulb and rest is history.  Failure is nothing but just a opportunity to make your self better and more efficient than before. Life is all about ups and downs, you just need to believe in yourself.

"Success is not final, failure is not fatal: it is the courage to continue that counts.” - Winston Churchill. 

Act like you have already achieved it.

At first you'll sound like a maniac or something but slowly and steadily when that greed to made it true not just delusion, it will make things better than formerly. Meditate for 5 minutes and see yourself in next 5 years you want to stand apart from the crowd regularly practice this and desire more what you prefer. It benefited almost every being who have tried this because this strategy fit things in our subconscious mind which makes the efforts double.

" keep your eyes on the stars and feet on the ground"

We have multiple examples of people who have believed themself and had reached where they always wanted to be. If they can then we also can. Everybody is same unless they started improving themselve.