It doesn't matter..

where you are coming from..

What matters is where you are going..

Take 10 minute breaks..

After 40 minutes of work..

I used to follow this regularly when I was in school, and it's high time I get back to this routine..
Working at a stretch, I have realized, does not work for me...I naturally end up making mistakes..

Slow and steady..remember..40 minutes work..10 minutes break :)