Instead of making posts about what people halfway across the world should do on a dying website, I'm going to link to organizations that you can donate to that can actually help.
Medical Aid for Palestinians (MAP) works for the health and dignity of Palestinians living under occupation and as refugees. They provide immediate medical aid to those in great need, while also developing local capacity and skills to ensure the long-term development of the Palestinian healthcare system.
Addameer Prisoner Support and Human Rights Association is a Palestinian non-governmental civil institution that works to support Palestinian political prisoners held in Israeli and Palestinian prisons.
Samidoun is an international network of organizers and activists working to build solidarity with Palestinian prisoners in their struggle for freedom.
Refuser Solidarity Network provides crucial support to Israel's military refusers in the toughest of political circumstances. They provide funds for for demonstrations outside prison, for legal fees, for media campaigns that tell conscientious objector’s stories to the general public, for education programs for Israeli and American audiences about their important resistance to the occupation.
Feel free to reblog with links to other groups and other places people can donate to.
Palestine Children's Relief Fund is very highly regarded!