There are always so many good travel tips, it's hard to pick just ONE each week! But this next one is important, never check a bag with important medication or items you might need. I always pack in a small carry-on, with a few things that could get me through 24 hours should by bag get lost in transit. There are certain items that are just harder to replace on vacation, especially if you are traveling internationally or on a cruise ship.
Going to a tropical destination? Make sure one of those items in your carry-on is a swim suit!