Preheat the oven to 350°F and line a baking sheet with parchment paper. In one bowl, whisk together flour, baking soda, and salt. In another bowl, cream the softened butter with the granulated and brown sugars until fluffy. Beat in the egg and vanilla extract. Gradually add the dry mixture to the wet mixture and stir until a dough forms. Gently fold in the blueberries and white chocolate chips. Scoop the dough into equal portions and place on the prepared baking sheet. Bake for 10 to 12 minutes, or until the edges are lightly golden and centers are set. Allow to cool slightly before transferring to a wire rack.