Plan your itinerary so that you know when and for how long you will need hostel accommodations. Start planning early, but remember that not all hostels accept advance reservations. Check out other reputable hosteling organizations such as Backpackers Hostels or Hostel Americas, or search for independent hostels in the area you plan to visit. Try destination-specific Web sites or directories or go to your local library and search telephone directories. Find out whether or not you will need to buy a membership to stay at specific hostels.
Hosteling associations offer membership deals.
Find out how many beds are available at the hostels you are considering and learn what sorts of sleeping and living arrangements are offered. If you are traveling during hot weather, you might also want to ask about fans or air conditioning. Find out what you need to bring with you. Remember that hostel accommodations are usually very basic. Call in advance to find out if the hostel of your choice accepts reservations or requires a deposit.