Rather than cutting grapes, cherries or cherry tomatoes one by one, try this. Arrange the fruit close together on a cutting board. Take a flat object (such as the flat part of a plate bottom), and place on top of the fruit. Press firmly, but gently. Run a sharp knife through the fruit, halfway between the flat object and the cutting board. Voila! Several fruit cut at once.
When I'm craving something sweet and cold, I go for about 1/2c of organic frozen dark cherries, put them in a bowl with about a 1/4c of almond milk (or skim or soy or yogurt even) and eat them up!