Advice?

So you all know my little sister Brigitte?  Well, she likes to cause trouble and I don't know what to do about it.  Know matter how many times I tell her not to use my stuff, she still does.  Both of my brothers and myself tell her to clean up after herself, but she doesn't.  It's like she expects us to do it for her.  In the morning if she needs something she will go in my room and say my name repeatedly until I wake up.  She asks for something that she didn't need at that moment, that she could've waited until I had woken up to get it for her.  But instead she goes along and wakes me up anyhow.  She does that a lot.  I don't know what I can do to make it stop.  Do any of you have advice about what I could do?