"Develop an "attitude of gratitude."Say thank you to everyone you meet for everything they do for you."- Brian Tracy
One of the best things that my speaking business mentor, multi-millionaire James Malinchak ( ) taught me was to always say "thank you". Well, actually my mom and dad taught me that first but James taught it in a different way.
He taught me that every time someone does something nice for you...does you a favor, gives you a gift, does business with you, gives you an interview..ANYTHING..get in the habit of putting a hand-written thank you note to them in the mail immediately.
It sounds simple, but this has an impact on people that you wouldn't believe. When was the last time anyone took the time to send YOU such a note?
And not only did he teach it, but he practices it. He walks his talk. At one time I had received SO MANY thank you notes from James that the law of reciprocity (where people feel the need to return goodness extended to hem) had me to guy and purchase him a sweater before I could feel right about it.
This also illustrates the law of what you put out into the universe coming back to you...often bigger and more fantastic than you sent it out. James never asked me for a sweater, but I felt COMPELLED to do something extra nice for the guy because he had given so much as my mentor.
At first, this can be a difficult habit to adopt. But I promise you this  if you will commit to working with yourself until you have indeed made it a habit you will NOT regret it!