Avoid politics Unless you know someone well, it usually pays to avoid expressing a strong opinion on the conflict – or at least consider your audience when doing so.
Be polite Even if it feels like nobody else is! Israelis are famously brusque – almost proudly so – so don't be surprised if interactions don't come with Ps and Qs.
Dress appropriately In Orthodox Jewish or Arab neighbourhoods. In buses and sheruts, a woman sitting next to an ultra-Orthodox Jewish man may make him uncomfortable. Depending on how you look at it, that's either his problem or a local sensitivity you should respect.