Hey, I took my time before reading what you said. I'm glad I did: after what kb and veen said, this sunk in better.
First of all, I'm so glad that you found what works for you. I'm always happy to hear that other people make good of their time on this planet. It's inspiring, too. I hope you keep sharing your progress: it helps people like me feel better about my chances.
I have a question, though. Have you ever felt, after you first, second or N-th 10 minutes were up, that you could just do more? If you did, did it feel, next day, like you can't mount that mountain anymore because you're not up for X times more than what you've initially set for yourself?
That's what always gets me with things like this: I come by a decent measured progress schedule, stick to it for a while (the most I've managed was three weeks, after which the mountain failure feeling set in) and fail when the next obstacle seems insurmountable, even though I've managed so far.
Or, do you ever feel overwhelmed by the responsibility or the perceived pressure of "having to" do something to continue the chain of habitual action?