At most occasion, I will not want to terminate all opened application, shut down and reopen one by one each time I want to resume my work. Putting the machine on sleeping mode is perhaps the most energy saving way, also the fastest way you can retrieve your work on the next start-up. Here’s a trick, a fast way to switch your macbook to sleeping mode.
Fastest way to put mac to sleep mode
How the following keys for 2 seconds,
Alt + Command + Eject
and your screen will turn off, that’s when you know your Mac has gone into sleep mode.