As a preliminary exercise it is good to spend some time every day simply watching our minds, listening to those drum beats. We probably shall not like what we see and hear but we must be very patient and objective. The mind finding itself watched in this way will gradually grow calmer. If we continue this exercise regularly for several months we shall certainly make some advance toward mental control.
2. As suggested by swami Vivakananda….. Try to put your whole mind into the work on Hand. Learn to focus mind on each and every task of your life: If you can train your mind to maintain enough concentration to pay attention to each task from moment to moment this is more than enough. When you are reading , walking resting, talking, walking, eating whatever you do in your daily life, act with the mind that is calm and that is paying attention to each and every act.
Buddha used no instrument in the investigation other than his mind.
For mind control people commonly pay attention to their breath or the Body but you could also focuss on an Activity such as Swimming, yoga dancing, craft work, God. All that matters is that you choose a meditative object and return to it when you get distracted.
One can practice Yoga or Meditation ,Japa and prayer, Breath awareness for mind control.
Every one should note the point that Mind is your object but not the subject. Consciousness or Awareness or Soul or Self is the Main Subject.
Always feel that you are the Self or Consciousness or Awareness as suggested by all Yogis.