Can mind be controlled? - Part 2

I am brooding over this issue since few days with no satisfactory answer. But today when I was into my morning yoga session, I went through a thought process. I was constantly being pulled into thought over issues from workplace and some family issue. Soon I was aware of this state. Slowly I started to remove those thought from my mind like wiping off the stuff written on a black board with a duster. Some stuff would start reappearing as I wiped it off. But I persisted. Soon the black board was blank and I could concentrate on my breathing before something appeared yet again. For some time this continued. And finally the blackboard went blank again.
This experience has given me some ideas. If I can wipe out thoughts though they keep reappearing, I may as well write new thoughts on this mental blackboard. Though it is difficult wiping off the old impressions which are sort of engraved on this black board, I can create new impressions and keep writing them over and over again till they get engraved and make a lasting impression.
This revelation gives me some more insight to my mind. Not all thoughts which have got engraved are the thoughts of my choice.But may be it is possible to engrave new thoughts which are my choice. Is it possible? May be. May not be. Perhaps I need to give it a try.
Any one who has similar experience ? Please share with me. I am eager to know. Waiting for your comments.

Can mind be controlled?

"Can mind be controlled" ? This question is troubling me for last few days. Have been reading few self development books since past few years. Many of them talk about changing life by changing thinking pattern. This needs controlling your mind and creating thought habits that change your life. I have been wondering if it is really possible.Authors of those books claim it is. They say you need practice to do it. I am not convinced. Has any one done it successfully ? I would like to meet one such person. Get in touch with me if you are one such person and share your experience.