I think this is something that every parent has to go through. The way I handled it was to try distracting my son from what he wanted but couldn't have. Also, if it was a matter of how he was trying to get something, rather than whether he got it, I always made sure to only give him what he wanted after he calmed down. It's just a frustration over the inability to communicate their needs. So, if you try to help her communicate her needs in a more positive way, it should help. Even at a year old, you can teach her to point or something, calmly, rather than to scream over not getting it. In the meantime, there will be a few more screaming matches for you to deal with, I'm afraid.