I definitely believe in it. I went to seminars on this subject 10 years ago, long before "The Secret" became popular. All the same information. But I had unknowingly been using the principles as long as I can remember.
I have focused on things I want, including material things, business objectives, trips, etc., cut out pictures and put them on a "Dream Board". I've gotten every single thing I've focused on by doing that. It involves pretty heavy concentration, daily reading your goals, looking at the pictures, and somehow it just all comes together. They say it's the vibrations you throw out into the universe, that come back to you fulfilled. Sounds good to me.
All I know is it works for me. I call it goal setting. Some call it prayer. Same difference.
Years ago, I had a conversation with my cousin's husband on this subject. I have been goal oriented my entire life and have achieved great personal and business success. My cousin's husband had not............he was 10 years older than us, never owned a home, always drove junker cars, couldn't hold a job, constantly broke, always sick or injured. I talked to him about setting some goals, using the knowledge I had acquired and the success. He said very bluntly "I don't believe in setting goals". End of conversation. What could I say to that piece of brilliance? I wanted to say "yes, and it shows". He was convinced everyone was out to get him, and he just got bad breaks, while the rest of us were lucky and were in the right place at the right time. He was a lifelong JW, but left them about the same time we did.
By the way, he passed away two weeks ago, a widower, living on a small social security pension, trying to get by, still believing he had had a lot of bad breaks. Sudden fatal heart attack. At least he didn't have a long lingering illness like his wife had.