I have to admit that growing up on the foggy, cool Canadian border in Washington State has left me with feelings of inadequacy when it comes to selecting the perfect watermelon. Now that it’s summertime, I find myself looking at the bins full of big green melons at Trader Joes knowing that it likely contains at least one is extra sweet and juicy. The problem, of course, is finding that one. Luckily David Leite has come to my rescue. Here is his most useful guide.