What does Odysseus do to cause the Cyclops to become careless; and when the cyclops asks Odysseus' name, what name does he give?

Odysseus offers the Cyclops three bags of wine.  The
Cyclops drinks the wine without thinking of the possible repercussions of this and
passes out.  This directly allows Odysseus and his men to blind the Cyclops after he
passes out.  Prior to this, Odysseus tells the Cyclops that his name is "Nohbody".  This
works out perfectly later in the story after Odysseus and his men sharpen a tree branch
and stab the Cyclops in the eye.  When this happens, the Cyclops tells the other cyclops
that "Nobody" hurt him after Odysseus and his men stabbed and blinded
him.