Travel Tuesday is officially here, and retailers are offering notable deals on hotel stays, flights , cruises and more during the event. However, many of the deals only last through the end of the day, so book quickly to take full advantage. I cover the biggest sales of the year as a writer for NBC Select, so I know how to find deals that are actually worth buying. I spent weeks combing through thousands of discounts to find the best Travel Tuesday deals, and will frequently update this list