So I have power management installed on my home PC, set to go into sleep mode if I haven't used the computer in a while. But what if I don't want it to go into sleep mode? For example, I'm downloading a bunch of large files that make take hours, or doing a backup over the network which can take all night. I could manually adjust the power settings on my computer to deactivate sleep mode, but I can guarantee you that I'll forget to reactivate it again.
There is a free software solution that I found, called Coffee. This is funny because I don't even drink coffee, but it does work for me. Coffee keeps a computer from going into power saving mode if there is network activity over a user-defined rate. So as long as the downloads keep going, so will the computer. When downloads are finished, then the computer will be, too.