There's really not much consistency in my sleep patterns, because I live near both train station that likes to blare horns at 5am and next to an office building that hires landscapers that get to work around 5:30am or 6am. So after going to sleep around 12-12:30ish, I have that junk waking me up, forcing me to stay awake for about another half hour before trying to return to sleep. And then, ultimately, I wake up just about whenever. Sometimes I can't go back to sleep after being woken up by all those annoying noises.