travel system

Do you have a travel system? Every time my husband and I go on a cruise, we bring out the list of the items that we should pack just a few days before the trip and start packing, just like most people do. After packing all our bags, the big day comes and we start our trip. But, unlike many others, we have a travel-system that serves us well, particularly on leaving day. Do you? Travel system means that I first make a list of the things that are of the most important to us. Things that either we could not do without, or that would ruin our trip if we forgot. For example: