Make a list of everything you think you will need for the trip. As you are doing this, have a calendar in front of you along with the proposed itinerary for the trip. Envision what you would generally need for each day of the trip and make sure each item is on the list.
Look at your list and try to make every item have at least two or three purposes each week of the trip. For example, if you are going to be going on a two-week vacation to the Caribbean, plan for your outfits for each day to be used at least twice each week.
Ask yourself if there is anything that can be scratched from the list. If something only has one use, ask yourself if it is really necessary. If it is, try to find a second or third use for it on the trip to justify the space it would take up in your luggage. For example, if you are traveling to Europe and you only plan to stay in a youth hostel for two nights of a three-week trip, it might be wise to omit taking a sleeping bag. Though some establishments require you to bring bedding, they also may provide bedding for a small fee. If they do not, you might consider finding accommodation that does. Though a sleeping bag for instance may seem handy, it probably would not feel very handy for the other nineteen days of lugging it across Europe.
Keep in mind that others who may be traveling with you may need the same things. If you can, share. For example, if you are traveling to Africa to go on a safari with your spouse, share your toiletries. Though you might not generally like the same shampoo, will it really matter when you are in an open-air jeep on a dusty road? If necessary, shop for toiletries together and find one you both can live with for the duration of the trip.
Research where you are headed in order to find out if the things on your list are necessary and not already provided. If you are going to stay with a family in England for a week, ask them what things you will need and what things you will not. Cutting out the unnecessary items can really lighten the load and save room for all of those souvenirs that find their way into traveler's bags.
Be resourceful as you are packing as well. Look at your needs and your list of items to take and consider whether any of the items can be used in creative ways. For example, if a dressy night out on the town is planned for one night of the trip, plan an outfit that could also be used casually. For a woman, that might be to take along a cotton-knit dress that can be dressed up with a nice necklace and dress shoes but dressed down with a casual shirt and sandals.
Make sure that each item can not be made any smaller. For example, travel only with as much toiletries as would be needed for the trip. Large bottles of shampoo are heavy and take up space. Also, keep minimizing in mind with your clothing as well. If you are going to a chilly place, pack one heavy coat and wear it on the plane instead of filling the luggage with it. Or, consider layering and reusing each layer on multiple occasions. As you try to pack light, ask yourself if any of the items could be switched for something smaller or lighter.
Pack everything you have now planned carefully into the suitcase. Be sure to use up every needed space. Consider putting items in your shoes and other bulky places. It can save a lot of space. Also, try rolling your clothing as opposed to simply folding them. There are also handy vacuum-sealing bags that can be used to shrink down bulky items. However, they sometimes require special equipment to be effective--equipment that may or may not be available where you are going.
While you are packing, review your list again and wait to pack any items you are questioning taking on the trip. Once you have packed every necessary item, consider the remaining items. If there is no more space, try to leave all the questionable items at home. By following these steps, you may find your trip a lot less of a hassle and a lot more fun for your back.
