Research ha proved

Research has proven that people who use a worry time find themselves worrying 35 percent less of the time within four weeks.

1.

Set aside a specific time each day to think about
the things that keep entering your mind and interfering with your concentration.
2.

When you become aware of a distracting thought,
remind yourself that you have a special time to think about them,
3.

Let the thought go,
perhaps with "Be here now,"
4.

Keep your appointment
to worry or think about those distracting issues