Robert Emmons, author of "Thanks! How the New Science of Gratitude Can Make You Happier," has conducted years of research on how gratitude affects our life, makes us happier and what we can do to develop a gratitude mindset.

Try these tips for developing an 'attitude of gratitude':

Think small. Don't wait for the big-ticket items that may never happens, such as winning the lottery. Be grateful for the seemingly inconsequential things in your life - the sun shining through the trees, the turtle you saw on the side of the road, the sweet kiss from your toddler.

Meditate. Meditation can open your mind to new ways of looking at the world and has many other benefits such as decreased moodiness, positive thinking and feelings of happiness. That can lead to a greater appreciation for what you have, i.e., feeling grateful.

Practice mindfulness. Staying in the moment makes it more likely for us to recognize when an opportunity to practice gratitude has presented itself.

Feel the appreciation first. Focusing on the specifics of what you are grateful for deepens your sincerity and makes your gratitude more authentic rather than just lip service. 

Practice these tips for a week and you'll be feeling happier and more grateful than before!