Execute several actions in a row. Try to chain more than ten items at a time when trying to meet a goal. Getting a big chaining bonus depends on how much food your tray can hold. For example, if your tray can hold six meals, serve six passengers all their food at once. Next, start preparing the meals for six more passengers. To get a twelve chain bonus, serve the six meals and quickly afterwards collect the garbage from the first six people you served. If all the passengers have not asked for their garbage to be picked up, wait a couple seconds until they do. Once you go to the garbage or prepare more meals, your chaining bonuses will be reset. You will have to start chaining all over again.