As I said on my personal blog, I don't claim to be GREAT at much, but I have finally figured out how to successfully cut a watermelon into perfect bite-size pieces. Every time I take a watermelon to a Summer BBQ, I'm asked how to do this. Here's how:
Make sure you have a long, sharp knife. This is super important!
Quarter your watermelon.
You're going to make a series of cuts in 3 different directions.
The quarter should now look like a grid. Dump watermelon into a large bowl, everything from the middle should fall out easily.
Now cut along the rind of the watermelon. This usually takes 2 passes.
Ta-da...perfect bite-size pieces.