As the saying goes, your mind could be your loyal servant as well as your deadliest enemy, the devil incarnate himself. The Buddha says it is your own mind and not your enemy that could be your greatest foe who can take you off the track and be a source of great destruction and violence.
Perhaps it was with this point of view that writers like Norman Vincent Peale and Napoleon Hill had stressed on the importance of mind control in methods best suited to you. One way that Peale has suggested is, “Formulate and stamp indelibly on your mind a mental picture of yourself as succeeding. Hold this picture tenaciously. Never permit it to fade away. Your mind will seek to develop the picture.”
Lord Krishna too has a somewhat similar way to control a mind gone astray.
He says when you are agitated and your mind has gone out of your control, the best way is to remember Him and “dwell in Him”. He will take care of all your wildly mindly problems! One can say that this is in essence close to the method suggested by Peale.
The crucial point here is to remember that your mind has the potentiality of conceiving and believing in anything and getting it realised too.
Napoleon Hill has this point of view made clear when he says that thoughts are just things, and very powerful ones at that. When combined with definiteness of purpose and a burning desire, they can be very easily translated into achievements.
If you still fail in controlling your mind, then try to recite your own favourite mantras at the same time. And if you don’t believe in the usual mantras because they don’t work for you, I would suggest that you have your own mantras. That would surely make your day as it used to do for me. You can tell yourself repeatedly, for instance, that your mind is your obedient servant and that it can’t be allowed to become your foe and destroy you!