I have always been early riser. I got this habit from my school days and I think it is one of the most important very good things in me :) For me if I do not get up on time I consider my day a waste. Seriously. If I can't do the first thing right then how can I expect the rest of the day as good.
There have been many times when I couldn't get up on time. The main reasons for this is lack of motivation or laziness. I usually get up at 4 AM every day and the moment alarm goes off I just get up and stand on my feet. Thats it. Rest of it is easy. Once I am up I never go back to bed.
I wish I could maintain this habit through out the year 365 days. I will try to do that this year!!