Whilst I broadly agree with this 'how to' guide to Boycotting Israeli goods, I would add a much more positive thing you can do to support Palestinians.
6. Buy Palestinians goods! Buy Zaytoun!
Sounds obvious? Well go here to buy the only fair trade, organic Olive Oil and much more besides. Bulk buy, and become a distributor, advertise in your local branch newsletter. BDS shouldn't be seen as just a way to 'target' Israel but as a positive affirmation of the right of Palestinians to exist with dignity. Buying Zaytoun is the best way to just just that.