That's the start of it. Not dwelling on the "lack" of something, but instead, appreciating and being thankful for what you already have. Then you will get more good things to appreciate. But, that's just the beginning....

It is down to thinking what you want but also acting on what we want.I also see that thinking what we don't want will certainly attract what we don't want.I have found these things happen in my life.

Well I know we're coming at this from very different perspectives, but I think I'll take a shot anyway. I think it's much more important to be aware of where our wants are coming from than it is to get what we want. In many cases, "wanting" is really a kind of unacknowledged suffering rooted in a sense of being incomplete. This is especially true for the sorts of abstract things that we want: being admired, happiness, success, confidence, etc. It's simple to understand: in order to want something, you have to believe that you don't already have it, that something is "missing". So, what is there to do but to go "out there" and find it? Obvious, yes? Except the things that we want most can't actually be found "out there", they are really a product of self-integration: in being whole, we see that we're already the source of those things like love, confidence, happiness, etc. There's nothing to search for, and nothing to want. If anything, when one sees that they are already the source of these things, the main interest becomes giving them away to others rather than trying to go out and search. So the constant pursuit of desires is widely -- and rightly -- treated by most religions as a suspect undertaking. When we really understand the nature of what we're seeking, we stop looking outside of ourselves for it.

Yes, even you don't believe in the law of attraction, it still makes sense in life to focus on what you want instead of what you don't want. If you already know that you don't want something and have established that, than what it the point of spending your time on it? It takes away from being able to appreciate what you already have and new things when they enter your life.

What I 'want' is not what I actually want. Wanting is a byproduct. What I actually want I cannot have.