This is far more interesting than I expected! Thanks for all the replies.
I boycott:
Nestle (& everything that they profit from) as much as I can,
Walmart - apart from their poor treatment of staff & exploitation, on my first visit to a US store, I was appalled to find guns and bullets being sold next to the kids bikes .
Gap & other big brands when I can
I never buy MacDonalds but I do work for their charity which, depsite the rest of the company, does a good thing that I believe in.
It is actually cheaper to buy store brand goods rather than Nestle etc anyway.
I buy:
Free Range Eggs.
Fair Trade tea & coffee & chocolate (although I rarely buy any of these things anyway)
If I have to buy meat or fish for someone, I make sure it is wild/ organic
I HATE that all toddler items seem to have Disney or Thomas all over them.
I hadn't really paid attention to the Israel thing, but don't think I buy much from there anyway. I'll investigate.