Nice topic!
I have actually started a daily routine with my daughters on being thankful for at least one thing every day. I t was tough as I got some reluctant responses from my elder daughter (for whose benefit I had the idea in the first place) like "I am thankful for nothing" but within 10 days, her attitude changed. And now she has sometimes even 5-6 things she wants to say thank you for. In fact she actually tells me "Oh I cant wait to say thank you this evening". I can see how her negative outlook on life (typical of pre-teen) is now improving from a simple technique like this.
As for my lil daughter she comes up with sweet little things like "Thank you for the birds eating food" and she too cant wait for our thank you time.
Thing is I am having a tough time thinking things to be thankful for, but those few minutes force me to look for something good in our lives.
I think everone should visit this thread once a week and say something they are grateful for :)
Today I was thankful that I managed to finish all the extra work I had so I can have my rest on Sunday. And I am always thankful eternally for my two little angels. May God bless them always.