We are constantly working on our garden (mind) which has all kinds of plants (seeds).

Everytime we ignore or escape from the thought, we are still giving attention to it i.e. watering it.

Sometimes we are aware of this, most of the time it is subconscious.

First step is noticing that the a thought has arisen. Don't fight it or run from it. Acknowledge it, say 'hello'. Think through if this has any relevance in your present.

If it does, plan the best step forward.

If it does not, take a deep breath and just visualize that you have chopped of a part of this bush with hedge shears. Wait a few moments and then carry on with your day.

Brain has the ability to be influenced by thorns and flowers equally. Use this mechanism to your advantage.

If you naturally feel grateful and relive good memories, great! Otherwise, set some time during the day for this activity.

Pick any thought - a person, a moment, nature, god, whatever makes you feel at peace. Fully live this thought, take a deep breath and imagine you are watering a flower pot.

With consistent effort, over a period of time your garden will have almost no thorny bushes and full of flowers.

Maybe a few trees as well :)

Use the power of visualization as that too is just a thought. A strong one because you are aware of it.