Snorkeling can be a memorable experience for millennials, but mistakes are common if people think it is easy. The document provides tips for properly preparing equipment like getting a dry snorkel to prevent water intake, fitting fins correctly, and adjusting masks and snorkels. Other advice includes slowing the swimming pace to conserve energy, relaxing, and breathing slowly through the snorkel. Getting equipment fitted in advance and contacting local guides for additional location details are also recommended.