Answer:
What loses its head every morning only to get it back every night?
A standard dimension for sandwiches and rulers
What goes through a door but never goes in and never comes out?
I have a ring, but no hands. I used to be plugged into the wall but now I follow you every where. What am I?
Temporary evidence of where you've been strolling
This food is a tortilla filled with cheese and sometimes chicken before being heated or cooked.