RED SEEDLESS GRAPES
What to look for: Red is the most popular grape by a landslide, but don't focus too much on the reddish tint, which can differ depending on the variety. Moisture is really what can sour your grapes. Don't buy anything smushed or with soft spots.
What to feel for: Since you're buying the grapes by the pound, it's in your best interest to search through multiple bags for the best grapes. Make sure to pick up the bunch you've selected. If the grapes fall off, "that's a sign of age", like a Ferrari or a second wife.
Lee Breslouer eats an apple a day, and can spot a bad one from a mile away. Follow him @LeeBreslouer, because you can't make a name that good up.