Focus on the important 20%, it yields 80% of your results.
“It’s also worth considering the impact on user experience. Google has shown us that users often prefer apps that do just what you want. That’s *just* what you want. And no more. The rest is arguably clutter and actually interferes with the user experience for only a limited benefit to a limited set of users. “- See more at: http://www.allaboutagile.com/agile-principle-8-enough-is-enough/#sthash.h251ZKTn.dpuf
The Pareto principle (also known as the 80–20 rule, the law of the vital few, and the principle of factor sparsity)
(15 July 1848 – 19 August 1923) was an Italian engineer, sociologist, economist, political scientist and philosopher.