The Law of Attraction simply says that you attract into your life whatever you think about. Your thoughts are your subjective reality. Your dominant thoughts will find a way to manifest. In subjective reality, you are consciousness itself, the container in which the simulation of reality is run. So in subjective reality, everything is indeed real. You’re real. I’m real. The physical universe is real. Everything you experience is a manifestation of thought. “Your mind makes it real.” (Morpheus – The Matrix)
Attracting abundance is knowledge. As any other skill people have, like driving a car, learning a new language … manifesting is no different. How good you are at it, depends on how much you practice it.
Grasping a better understanding of how the "law of attraction" works is the first step in bringing abundance into your life: There is only one subjective reality, and it’s yours. It’s important to correctly define the you in subjective reality. You are not your physical body. No-one else has a subjective reality because they are all in your subjective reality. You can therefore not have a conflicting reality with someone else, as that someone is only part of your reality. Everything around you is manifested by you; your house, your car, even your body and your health. Nothing has any power in your reality except thought itself.
So, if thought created your reality at the moment, thought can change it. Have you ever thought about what you don’t want just to see it happen to you? Have you ever worried about something and saw what you worried about happen?
So how do you change your reality? How do you create thoughts that will manifest? Basically, just wanting something isn't going to bring that to us when we continue to obsess on the not having of that something. All we will experience is "not having" and will be ultimately blocking our true desires. You have to focus on what you want and not on what you don’t want, and you need to experience it in your imagination as being real and not just a fantasy. The more energy and certainty you put into a thought, the more dominant it becomes. You might find that you have conflicting thoughts. If that happens, you have to change your beliefs in that area. As soon as a thought corresponds to a belief you hold, that thought will manifest effortlessly. So how do you change a belief? Imagination comes in handy again. You imagine the opposite of the belief that you hold as real, and you imagine the belief you hold as no longer real. You do this for 21 days and your mind will accept it as truth.
If you don’t believe your thoughts can change your reality, then they won’t. If you don’t know what you believe, then you manifest uncertainty. Your reality will appear uncertain and confusing.
Those people who are efficient in attracting have trained their minds to focus on their desires. They have learned it so well that they often don't even realize how they do it. Abundance comes to them naturally.
To change your reality, assume responsibility for the reality you have created. Then begin creating the reality you truly want by thinking consciously about what you want (and feel good about it) and stop thinking about what you don’t want. You will know you are doing it right by your feelings. If you feel bad, you are thinking about something you don’t want. You then just need to stop thinking about what you don’t want, and start thinking about what you do want, changing your feelings, and your thoughts will manifest.
Books on the Law of Attraction:
Jack Canfield's Key to Living the Law of Attraction: A Simple Guide to Creating the Life of Your Dreams