Letting go is merely arriving at a decision that's no more allowing something from the past tense to influence your life today or to cut down your inner sense of peace and welfare.
So all we have to do is to relinquish the beliefs and mental attitudes that keep us from receiving the pleasure of the moment.
The issue comes in discovering precisely what that means; we have so many notions that keep us from living in the present moment, from becoming content and peaceful inside.....