Are you a morning person or an evening person? The sort of person you are can effect how you practice your instrument.
If you asked me to practice at 6am, or honestly anytime before 10am, I would be useless. I love my sleep and I need a brew or two before anything; I admit I am at my best in the afternoon or evening and usually find it hard stopping what I am working on.
One of our teachers at the Academy starts practising around 5am, honestly I have no idea how, but he does not understand how people do not practice bright and early. One parent sent me a note "I woke up this morning to somebody playing the piano. Actually not a bad way to be woken up in the morning. She’s already done 45 minutes today." It seems Bobby also has the early morning practice bug. Find out more about identifying the best time to practice for you on this link