Eminent psychology professor and gratitude researcher at the University of California, Robert Emmons, commented  that there are two key components of how to practice gratitude:
We affirm the good things we have received
We acknowledge the role other people play in providing our lives with goodness

 Appreciate everything, big and small and learn how to be grateful
Gratitude should not be saved for the “big” things in life. The habit of being grateful starts with appreciating every good thing in life and recognizing that there is nothing too small for you to be thankful for. 
We should be grateful  for each breath and learn how to help others. We are alive and this is the best reason for being  grateful to God and to our life .

Practice meditation 

Sit down daily and think about five to ten things you are grateful for. This Gratitude  Meditation will help to soothe your mind . It will help you to think over the journey of our life which is incomplete  without help from others ' assistance  and guidance. Doing this every day will rewire your brain to be naturally more grateful, and you will start feeling happier after every session.

It only takes eight weeks of gratitude practice for people to start showing changed brain patterns that lead to greater empathy and happiness.

Your brain is a powerful tool, and training it towards gratitude is all part of ensuring that the gratitude comes more easily as you practice.

Keep a gratitude journal

Though it is difficult to maintain a record of feelings, a gratitude journal
 will surely help to change your  perspective  towards life. Keeping a journal of all of the things you are thankful for can help you keep track of and refer back to the positives in your life.

Write down your positive thoughts to further focus your attention on the subject. While you are putting the pen to paper, you have no choice but to consciously think about the words you are writing without other distracting, ungrateful thoughts.

You can write  every day after your gratitude practice, or you can come back to the journal on a regular schedule weekly or monthly.
Express yourself

It is scientifically proven that if you write a letter of happiness or gratitude to others it will increase your inner happiness. It is called “science of happiness". Happiness level can rise from 2 to 4% and when the same people made a phone call to the person they were thankful for to express their gratitude directly, happiness levels jumped from 4% to 19%.

https://updeed.co/