An oldie but a goodie. Some days you just get it right.

One day a man was walking on a beach when he saw another man coming the other way who appeared to be dancing. As he drew nearer he could see the man was not dancing but was gently picking up starfish from the beach and throwing them back into the sea.
"Why are you throwing starfish into the sea?" he asked.
"Because they have been washed ashore, the day is getting hot and if I do not throw them back they will die," replied the dancer.
The man looked around him and saw that the beach went on for miles and that there were many thousands of starfish along its length.
"But there are too many" he protested to the dancer "you can't possibly make a difference."
The dancer smiled, picked up another starfish and gently tossed it beyond the waves, back into the sea.

"I made a difference to that one." he said.