Coping/Pasting Objects from one FLA to Another

Sometimes I need to be able to import layers/library items/whole libraries from one movie to another.

I’m sure many of you have had to do this as well, but can you give me some ideas for what is the best practices way of doing this and some examples that you often run into. Will help me a great deal in understanding the best way of grabbing assets from one movie and transferring to another.

THANKS!!

SKURGE