My son and I, along with other family members, will be sailing on our first 7 day cruise in August. We have only been on 4 day cruises in the past. Can any of you seasoned cruisers give us any tips for our first longer cruise (i.e. - pack light and do laundry, alternate days for excursions, dining room tips, formal nights, etc.)? I am thinking there must be some special considersations when taking a longer trip vs. a shorter trip. I know there is a lot of knowledge here and I hope you will share some tips with me. Thank you in advance!!