Action logic

When you're bringing a reader into your world, you have to make sure that they can follow along with what you're creating for them. To do this, you have to make sure your characters' actions are complete and logical.

If Casey is in the kitchen on the phone, you can't suddenly have her in the living room throwing a book at her little sister for eavesdropping. She has to put the phone down. She has to walk from the kitchen to the living room. She has to grab a book. She has to do all these things.

While you don't have to describe every step Casey takes, you have to describe enough for your reader to follow and for the actions to be realistic. There has to be enough time for Casey to get from one room to another. You also have to explain how her little sister doesn't realize Casey's doing this, even though all little sister is doing is spying on Casey.

You may have your scene's action clear in your mind to get everyone where they need to be, but make sure that you give enough description for your readers to follow along. Describe away. Cutting anything extra later on should be easy enough.