Hi, Well for having gone to bed at 1am, a 7:30 awake time is pretty darn good! If it were me I might have conked out until 9am.
Just keep working at it. I'm a little bit surprised that the hardest part of this getting-up-early thing for me is actually getting into bed early, that is the part that is taking focus and discipline for me, not the waking up part (as long as I get about 7.5 to 8 of hours sleep, that is

) I can't follow Steve's advice of bed whenever you're tired, rise at exactly the same time each day. I need to get into bed at the same time each night, I guess I'm lucky that I don't ever have trouble falling asleep once I'm in bed. Who knows, maybe once I get more used to this up early thing I'll start with the flexible bedtime, rigid wake time, but for now if I get to bed late, I will let myself wake up later so that I'll be functional during the day. The first few days I was doing this I stuck to 5am each day no matter what and I was really downing the caffeine to stay functional.
Good luck and keep with it!