For many many years I was a morning person, up by 5:30-6am. Not too bad of a time for farm life (though my grandparents were up a lot earlier than that). The last couple years, after not being able to get into bed at a reasonable time (my son has autism, and we have some rough nights), it's been 7:30-8:30 most mornings, a rare 9-9:45am. Since getting chickens I'm trying to get my rear end up by sun up or shortly after to let the chickens out of the coop. I seriously sleep right through an alarm clock, always have, they don't work for me. I've tried different ones with different settings (blare the radio, buzz, etc). My rooster doesn't crow at the crack of dawn. This morning I considered it a good morning because I was up and opening the coop at 7am (sun working on rising). I don't put them up, they actually go in on their own in the evening and I go out and close the door when I'm 100% sure they're in for the night. I even leave the blind open in the room I sleep in since it's on the back side of the house (sun rises on that side) to try to help, and since it's been cool enough I've been keeping the window open, but darn rooster doesn't crow bright and early, he starts around 8-9am (he'll be 5mos on Friday).
So, if an alarm clock doesn't get you up what works for you?