Can you get to some specifics about that? That might help you focus a bit as "better programmer" is rather general. What specific areas are you trying to improve?

Also, it might seem that your lack of discipline and commitment comes from complacency due to the day job, but in my case, after being laid-off, I found myself procrastinating just as much (I got all day now right?) so be careful about making any sudden moves in that area.