input question: To attach LEDs to a brass wire,

output answer: Use double-sided tape to hold the LEDs in place as a guide. Afterward, take your soldering iron and carefully solder the ends to the wire using a little bit of solder.

input question: To decrease the number of calories you consume while drinking soda,

output answer: drink a low calorie or zero calorie alternative.

input question: how can I safely and quickly cut small fruits or veggies? (like grapes or cherry tomatoes)

output answer:
Place grapes or tomatoes on a plate, set another plate upside down on that, grasp the top plate with one hand, with the other hand slice through all the fruits in one gentle sawing motion.