How to go to standby after period of no use

[Sidarth Dasari <sidster802@gmail.com>]

Hi,
I run a headless debian home server for personal use. For the past year 
ive been letting it run 24/7.
I was wondering if there was a way to make debian go into standby mode 
or something similar after a period of unuse. I would also need it to 
recover with the use of a magic packet or something along the lines of 
that.
Is there a way to do this?

Thanks for any help
Sid