Windows Wakeup and Sleep

If there's a computer you'd like to have sleep and not wake up in an unwanted fashion by some mysterious wake up event, then read on...

To view the last cause of a wakeup (and possibly discover a culprit): powercfg -lastwake
To determine which devices can wake up a computer: powercfg -devicequery wake_armed
Is there any software that will wake the computer up: powercfg -waketimers
How is the BIOS configured / What are the motherboard sleep capabilities: powercfg -availablesleepstates

Thanks to several sites for information;