In the Midrash Tanchumah we find an interesting question, one that at this day and age we take for granted. The question raised was, if one builds a new house, what Berachah does he recite. The answer is he recites the Shehechiyanu.
The Midrash continues to show that even Hashem blessed what He created. The Torah states Hashem blessed the seventh day: וַיְבָרֶךְ אֱלֹקִים אֶת יוֹם הַשְּׁבִיעִי. (Gen. 2,3) When He created the animal kingdom and the birds He blessed them: וַיְבָרֶךְ אֹתָם אֱלֹקִים. (Gen. 1,22) When He created Adam and Eve He blessed them: וַיְבָרֶךְ אֹתָם. (Gen. 1,28)
Of course, the blessing of Hashem is not the same as when man blesses. Hashem blessed them for their success. When man blesses Hashem it is for thanks for His gifts to us.
The main message that the Midrash wants to convey is that we owe appreciation to Hashem for His kindness to us. We can take a lesson form this. Often people do us favors which we may appreciate but we fail to give them the proper thanks for what they do for us. We must be ever mindful to offer our thanks and appreciation to anyone and for anything that is done for us as a kindness.