Tantrums go away!

Hi,

I am a mother of a pretty and lovable 3-year-old. She's our only daughter and she's a little (yeah, only a little!) spoiled. I often talk to her and tell her that mom can't always attend to her when she calls because I need to work - for us. Sometimes she gets it and tells me it's okay, but other times she gets into tantrums, throwing her toys and shouting.

I get so depressed when she does these things. I think I have raised her well, taught her to be kind to others. I think she is, but I can't stand it if she keeps throwing these tantrums forever! Any advice on how to stop these behaviors?