How much spare time do you have, what are your living conditions like, your energy levels, hours of sleep, computer speed, monitor size, task management approach? I ask because you need to: A. build an environment conducive to producing. B. practice discipline. Like you, I had some half-baked blogs and projects that were doomed for failure. After way too much wasted time it was obvious that I wasn't living a lifestyl…
For long-term goals, the most important section -- base conditioning -- aims at slowly building up your body's training capacity. If your body can withstand one more hour of workout without injury or sickness, then over time these gains will accumulate. As opposed to strength training though, it can take many months before there is a tangible difference.
I feel as though for the brain, and creative work in general, the situation is very similar. With months and years of "training", it too can withstand to work for longer hours. The parent's comment on creating the proper environment is certainly key.