Thanksgiving is an interesting word. At the root of it is the word, "thanks," and at the end of it is the word, "giving." Looking at it this way is funny because rarely does anyone, myself included, say thanks after they give.
I realize the actual word is meant to represent the "thanks we give" for all that we're thankful, but still. It's a funny thought to give to someone and say thank you, rather than to say thank you just upon receiving something from someone; however, giving is a blessing, and I think it's good to be thankful for opportunities to give, just as it is to be thankful for opportunities we've received. As the Proverb says, "The generous will themselves be blessed, for they share their food with the poor." Not only is the blessing of receiving something to be thankful for, but so is the blessing of giving.
Even though the heart behind Thanksgiving is being thankful for all we have, maybe it's important to be thankful for all we have gotten to give, as well. After all, it's better to give than receive, and where things are better, things call for more thanksgiving.
Happy Thanksgiving!
-Cliff
Cliff's Note: Be thankful not only for all you have, but also for all the opportunities you've given others to "have."