Make sure your passport will not expire until at least six months after you return home.
You may need a pre-arranged visa/entry permit. Visitors from most Western Countries do not require a pre-issued visa.
If you intend a later visit to any of these countries, ask the passport officer on arrival in Israel not to stamp your passport. You will be given a stamp on a separate piece of paper (which you will need to present on departure).
In case documents are lost or stolen, photocopy the first two pages of your passport, your traveler’s cheques, airline tickets and travel insurance details. Leave one copy with a friend at home and take the other with you (separate from the originals) or give it to a friend who is travelling with you.
If you are a national to a country from which you need a visa to your destination. Make sure to have it pre-departure