"Count your blessings," we're often told -- but what good does that do us? Plenty, according to Robert Emmons, the world's leading scientific expert on gratitude. After a decade of research, Dr. Emmons has found that people who practice gratitude have stronger immune systems, feel happier and more optimistic, and are more generous and compassionate.

The benefits of gratitude include :

Physical

Stronger immune systems
Less bothered by aches and pains
Lower blood pressure
Exercise more and take better care of their health
Sleep longer and feel more refreshed upon waking.
.
Psychological

Higher levels of positive emotions
More alert, alive, and awake
More joy and pleasure
More optimism and happiness.

Social

More helpful, generous, and compassionate
More forgiving
More outgoing
Feel less lonely and isolated.

How to increase ones sense of gratitude :

1. Keep a Gratitude Journal. Establish a daily practice in which you remind yourself of the gifts, grace, benefits, and good things you enjoy. Setting aside time on a daily basis to recall moments of gratitude associated with ordinary events, your personal attributes, or valued people in your life gives you the potential to interweave a sustainable life theme of gratefulness.

2. Remember the Bad. To be grateful in your current state, it is helpful to remember the hard times that you once experienced. When you remember how difficult life used to be and how far you have come, you set up an explicit contrast in your mind, and this contrast is fertile ground for gratefulness.

3. Ask Yourself Three Questions. Utilize the meditation technique known as Naikan, which involves reflecting on three questions: “What have I received from __?”, “What have I given to __?”, and “What troubles and difficulty have I caused?”

4. Learn Prayers of Gratitude. In many spiritual traditions, prayers of gratitude are considered to be the most powerful form of prayer, because through these prayers people recognize the ultimate source of all they are and all they will ever be.

5. Come to Your Senses. Through our senses—the ability to touch, see, smell, taste, and hear—we gain an appreciation of what it means to be human and of what an incredible miracle it is to be alive. Seen through the lens of gratitude, the human body is not only a miraculous construction, but also a gift.

6. Use Visual Reminders. Because the two primary obstacles to gratefulness are forgetfulness and a lack of mindful awareness, visual reminders can serve as cues to trigger thoughts of gratitude. Often times, the best visual reminders are other people.

7. Make a Vow to Practice Gratitude. Research shows that making an oath to perform a behavior increases the likelihood that the action will be executed. Therefore, write your own gratitude vow, which could be as simple as “I vow to count my blessings each day,” and post it somewhere where you will be reminded of it every day.

8. Watch your Language. Grateful people have a particular linguistic style that uses the language of gifts, givers, blessings, blessed, fortune, fortunate, and abundance. In gratitude, you should not focus on how inherently good you are, but rather on the inherently good things that others have done on your behalf.

9. Go Through the Motions. If you go through grateful motions, the emotion of gratitude should be triggered. Grateful motions include smiling, saying thank you, and writing letters of gratitude.

10. Think Outside the Box. If you want to make the most out of opportunities to flex your gratitude muscles, you must creatively look for new situations and circumstances in which to feel gratitude.

- Robert A. Emmons, Ph.D., is the world’s leading scientific expert on gratitude. He is a professor of psychology at the University of California, Davis, and the founding editor-in-chief of The Journal of Positive Psychology.