Most of my life I have focused on what I don't want and have ended up getting exactly that. In the past few years I have discovered a different way of being and my life has changed. I found that if I focus on the negative I get negativity, but if I focus on the positive then that is what I get in my life. Let's say I want more money. In the past, I would ruminate on how little money I had. Guess what? I wouldn't have any money. No matter how much I made, the money would slip through my fingertips. Lately, my focus has been on having piles of money, enough so I can do whatever I want in life: travel, creative projects, buying gifts for others (and myself). If I can stay focused on oodles of money and be excited about having it and spending it than money pours in. If I focus on how little I have, that I can't pay the bills, that I can't get what I want then the money almost instantly dries up and disappears. It is a constant practice, after all, it has only been a few years of trying to be positive and the rest of my life of negativity and not getting what I wanted, but at least I have discovered the secret. There are a ton of resources out there on this very idea and many of them are not new. I will list a few just below.
Resources:
1) The Power of Intention by Wayne Dyer
2) The Secret by Rhonda Byrne
3) The Richest Man in Babylon by George Clason (originally written in 1926!)
4) Think and Grow Rich by Napoleon Hill
5) Manifesting Change (Audio) by Mike Dooley
6) Ask and it is Given by Abraham-Hicks
7) Any of the live cd's from Abraham-Hicks
Your practice today is to stay in the positive. Your thoughts can be changed, it just takes practice.