I plan on putting my echo in my bedroom. During the night I often have great ideas, and I can tell Alexia to make a note for me.
Also, during the night, questions often pop up (can you tell I don't sleep the whole night through? LOL) and I will be able to ask her questions related to whatever current book I am reading. Currently reading a book about mapping transform faults and I often reflect on what I have read as I lay there trying to fall asleep. Now I won't be tempted to get out of bed and look up whatever question I have, I can simple ask the Echo.
Also plan on using Echo as a very flexible alarm clock.