Wikipedia explains Law of Attraction as follows
" In the New Thought philosophy, the law of attraction is the belief that by focusing on positive or negative thoughts a person brings positive or negative experiences into their life.The belief is based on the idea that people and their thoughts are both made from "pure energy", and that through the process of "like energy attracting like energy" a person can improve their own health, wealth and personal relationships."
To make it simple, Law of Attraction simply says that “like attracts like”. What we focus on in our minds, we attract into our existence Positive thoughts attract positive experiences and negative thoughts attract negative experiences.
It is the Law of Attraction which uses the power of the mind to translate whatever is in our thoughts and materialize them into reality. In basic terms, all thoughts turn into things eventually.But in real circumstances, there is a lot more it.
Law of Attraction is not a Magic.
Many people think about Law of Attraction as a magic!
May be because of that reason it is often misinterpreted as 'you just wish for what you want doing nothing until it 'magically falls into your lap'.People often forget that Law of Attraction is not an instant solution for anything.It is a process backed by a solid state of mind and some fundamental steps as follows
Be clear on what you want - Clarity is the most important thing in manifesting process because if you don't know what you want, how could you expect that in your reality?
Ask for it - You must ask the universe for the thing you want in your life.Many people fail here because they consider themselves unworthy or selfish if they ask for something.
Believe that it is yours - Here you believe that whatever you asked for is yours now.
Visualize you owns it and bring that feeling of achievement when you visualize it.You claimed it in your name and no one can take it away from you.
In a nut shell, you can conclude it as "Ask, Believe and Receive"
Even though these steps seem very simple to you, it requires a lot of dedication and imagination because you are visualizing something which you don't have access to at that time.
History
Proof of the practice of Law of Attraction can be uncovered throughout the ages; all recorded and taught in different ways.Its principles can be discovered in the teachings of many civilizations and religious groups. Throughout history, a great many women and men who have left their mark on this world have shown the Law of Attraction to be one of the greatest powers on earth; with many well-loved poets, artists, scientists and great thinkers such as Shakespeare, Blake, Emerson, Newton and Beethoven all conveying this message through their many works.
Conclusion
Law of Attraction will not work if you are simply wishing for something. Wishing has always been an expression of scarcity and wishes are never granted when they come from a point of scarcity.For example, you can’t get more money by trying to wish it into your life.