Looking for the best Carnival cruise tips and advice for your vacation? Whether it's your first cruise or you're a Diamond level passenger (the highest tier of Carnival's loyalty program), there's always more to know. Meanwhile, the cruise line is constantly innovating, making changes, and improving. To help you out, we've rounded up dozens of our best Carnival cruise tips. The advice below can help you save money, save time, or generally just have a better trip. Note: This article contains affiliate links. Cruzely earns a commission for purchases made through these links, at no extra cost to you. 1.