For example, I'm leaving for a trip to Australia. You can start with the fact that you need to charge equipment, so the first to fall into the backpack are the banks. Two phones follow: push-button and touch. The first to call, but the second, because you need the Internet. Then I will put a tent, a rug and a sleeping bag. It will be necessary to sleep somewhere. Printed map to be atmospheric. First aid kit, where I put different things, Required nail clippers and shampoo. Some kind of clothes and comfortable sneakers. I walk a lot so I will need sneakers very much. Do not forget about the corkscrew. It is advisable to bring along a needle with a string, and then you never know what. This is what you do not need to take with you a dictionary of 500 pages of English and expensive jewelry.