Following are the certain things that are necessary for a trip:
To travel outside the country, every person needs a valid passport. Many countries also require you to apply for a visa before entering, or they require you to have a visa if you plan to stay for longer than 90 days. This is the basic necessity if you travel to another country. Without the documents your trip is incomplete.
You should prepare for all possibilities by carrying money in multiple places and multiple forms. Don't carry around a wad of cash; avoid carrying more than a couple hundred dollars at any time and store some emergency cash in the hotel safe. Bring your debit card and at least one credit card for emergency use. You'll also need a money belt to carry around as a day pack.
Even if you are traveling a few towns over or to the jungles of Africa, you need to consider medical needs before your trip. Check travel.state.gov to see if your destination country has vaccination requirements for foreign visitors; if so, bring proof you've been vaccinated. If you are not vaccinated then you may have restrictions for your trip abroad.
The major and necessary part of all vacations is walking. If you're visiting a beach locale then flip-flops are fine, but also bring at least one pair of sneakers and padded socks. Choose a pair of sneakers. Consider bringing another pair of dressy shoes for evenings. If you are travelling to a place where you'll see snow, you'll need waterproof snow boots as well.
Even on a summer vacation to a island, you need to pack at least one jacket. You may assume that you'll encounter rain on any trip and pack a waterproof windbreaker with a hood. When you're traveling to a cold or snowy place, you'll need a warm wool coat. Its obvious that the destination determines what type of clothing you'll be needing, but bring at least three bottoms and four or five tops for a trip that's a week or longer. Wash and re-wear these clothes for a longer trip. Look for black pants that are wrinkle-resistant, plus one pair of dark jeans. Bring a combination of casual T-shirts and dressy shirts, plus a light sweater.
Map is the most important asset when you're visiting a new place, especially when you don't speak the local language. A map on your hand-held GPS is better than nothing, but a paper map is preferable since you can't rely on technology to work when you need it. A guidebook should include a map and will give you information about which areas you should explore and which you should avoid, and about train and bus lines so you can get yourself around. This is one of the most important asset if you are visiting a new country and you don't have any knowledge about the country.
Carry your mobile phone with you everywhere, and remember to bring its charger. If you want to bring an MP3 player or laptop be sure to bring there chargers as well. You may also need a power adapter.
Once you've gathered all your travel necessitiesm invest in a suitcase with wheels. Consider a bag with spinner wheels, which has four wheels that spin in all directions so you can change directions quickly. If you're flying, check your airline's restrictions on luggage size and weight. Keep locks on your suitcases at all times for a safe side. Avoid stuffs like make-ups and similar items.
Hope these necessities help you while you travel.