A lot of gluten free stuff has been covered so I'll go with dairy-free. Daiya is the only cheese substitute I'll eat. I know there are some awesome ones available in Europe and bigger cities, but where I live Daiya is my one and only. Teese is not good, Follow Your Heart is passable, Tofutti is ok for cheese singles since they taste like Kraft and work for nostalgic grilled cheese, there are a couple over brands that are soy based but watch out for casein which makes its way into a lot of them.

Tofutti also makes sour cream and cream cheese that is pretty good. Granted, I haven't had the real thing in years so I'm not sure how someone used to dairy versions would find them. There are lots of delicious ice cream options as well.

For milk I love Organic Valley soy milk, but Almond Breeze is a close second. Silk is ok for when I'm not near a coop or health food store. For the asceptic packages of milk Soy Dream has always been my favorite.