How do I configure emacs to remember last opened buffer on the next emacs session?

[Elchanan Sharon]

Hi,

I searched the archive a while but failed to find the answer to the 
following question:

Working with emacs, I usually open a lot of buffers (20-30).
There is always a time I need to turn off the computer, hence closing
also the emacs session.

I am looking for a way to make emacs when re-activated, to remember and 
open all the buffers that I recently worked with last time.

Any RTFM/links are welcome.

TIA,

Elchanan Sharon