I also recommend downloading this app called "Packpoint" as it will tell you what you will need to pack based on several input factors like destination, length of travel, weather conditions, activities, and essentials, and even whether you're willing to repeat basic clothing, or whether you'll be able to do your laundry at your destination. The app is easy to use and ensures you don't forget what is important. 

The app includes a homescreen widget that can help you stay on top of your packing list. It also includes integration with TripIt, enabling automatic creation of packing lists. You can also share created lists with family and friends.