Remember, y'all. Tomorrow is April 1st, which--to quote Puddnhead Wilson--"is the day on which we are reminded of what we are on the other three hundred and sixty-four."
Prepare yourself for the salt-in-the-sugar trick tomorrow morning with The 100 Top April Fools' Pranks of all time. My personal favorite would be the April 1998 issue of New Mexicans for Science and Reason. Now, we do not wish to criticize New Mexico, which we are sure includes many, many citizens who favor science and reason, but this journal has never had a terribly high subscription base.
And yet despite that small circulation, the journal became famous for publishing an article claiming that the legislature in my home state, Alabama, had changed the value of pi from 3.14... to its "Biblical value" of 3. The article spread on the Internet, was taken as gospel (so much for science and reason), and continues to get occasionally forwarded to this day.
Oh, and if you're looking for April Fool's pranks, consider taking a page from hilarious prankster Uday Hussein. Between 1998 and 2000, Uday's newspaper published a different hilarious April Fools' Day story each year, including one asserting that jokingly told the Iraqi people that their food ration would be increased to include bananas. The people were all like, "Oh thank God, I'm so hungry," and then Uday was all like, "Just kidding," and then the people were all like, "Oh, ha ha! That was a good one, Uday. It's nice to know that you're not too busy with your 1,200 luxury automobiles to share a joke with the commoners now and again."