Israeli settlements are growing in the West Bank and increasingly destroying any possibility of a two state solution. The areas in white and blue (below) are restricted areas inaccessible to Palestinians. Much of this land is used for military and agricultural purposes by Israel. Israeli settlements are scattered throughout the West Bank and are interconnected by Israeli exclusive roads. These roads surround major Palestinian cities such as Jenin, Nablus, Ramallah, Hebron, Bethlehem, Jerusalem, and Jericho and thereby severe Palestinian means of communication and migration between these cities. Most Palestinians that born and raised in the West Bank have never seen either Bethleham or Jerusalem. Since the West Bank no longer has a viable border, the territory can no longer provide Palestinians with a state.
Israeli settlements are growing. Boycott the goods and services that are produced by their inhabitants to protect yourself from supporting the occupation and the destruction of the last viable solution.
It is illegal for Israelis to boycott goods and services from settlements. Such actions are prosecutable by law. You living outside of Israel are free to do what you want to uphold justice at least on the bounds of your wallet.
In a April 2013 Jerusalem Post article: The European Union seeks to correctly label which products are made in Israel and which are made in Israeli settlements: http://www.jpost.com/Diplomacy-and-Politics/EU-working-on-guidelines-to-label-West-Bank-products-310760
In a August 2012 Guardian article: South Africa re-labels starts practice to distinguish goods from Israel and Israeli settlements. http://www.guardian.co.uk/world/2012/aug/23/israel-south-africa-west-bank-label
Some companies that operate in Israeli Settlements are:http://www.keter.com/
Settlement: Barkan I.Z.http://abadibakery.com/
Settlement: Atarot I.Z.http://www.sodastream.com/
Settlement: Edomim I.Z.