When flying, you can bring essential items like a small carry-on bag and a personal item, such as a backpack or purse. In your carry-on, pack travel-sized toiletries (under 3.4 ounces each), electronics like a laptop or phone, and important documents like your passport. You can also bring snacks, medications, and reading material. However, be mindful of prohibited items like sharp objects and large liquids. Most airlines allow one carry-on bag and one personal item, so pack efficiently. Check with your airline for specific guidelines to ensure a smooth travel experience.