To make the effort to take and give good wishes is to constantly experience contentment.
Experience:
Whatever the kinds of personality of the person, if there is this one aim of taking and giving good wishes, there is positivity in every interaction. Attention is paid to make every word and action full of positivity. Words spoken only give happiness to others and give some kind of support to the other person to be better than what he is.
How to take it into Expression:
When I understand the importance of having good wishes for all, I am able to receive good wishes from others too. I am able to be free from the influence of the negativity of the situations and people. So I constantly experience inner happiness and contentment, even if I don't get something outwardly.