This might sound strange, but if I focus on a point about a foot in front of my eyes and hold it there while breathing slowly, I'll often fall asleep quickly. I

This might sound strange, but if I focus on a point about a foot in front of my eyes and hold it there while breathing slowly, I'll often fall asleep quickly. I don't know exactly how to describe it. It's something like projecting your thoughts onto that point, not just thinking about the point. I use the technique when power napping.