JT Smith

If you find yourself spinning your wheels while trying to implement something, it’s usually a red flag that you need to step back and take another look. It might mean you didn’t put enough thought into designing whatever you’re building, or it might mean that you’ve discovered and unforeseen hiccup that may require you to change direction.

Learn to recognize when you’ve lost focus, or are having a harder time than normal completing a task. Use this recognition to re-evaluate the situation. You’ll ultimately produce better code, and you’ll get back to being productive faster. 

[From my blog.]