If you don't have the tools to check internal temperatures consider this:
You can also judge doneness by how the food is holding together (depending on the food). For example, if you tug on a chicken drumstick and it falls off, it's done. On a pork butt, if the bone portrudes from the butt, it's done.
Dr. Mark (STL)
Ph.D. (honorary) Bovine $hitology
A thin line separates paranoia from an acute understanding of reality.