80 20 Principle Websites
Focus Quick | Use the power of targeted thinking to get more done
- focusquick.com
5,450,260
$
240.00
Learn language faster with Pareto's law & frequency words | ThousandOn
- thousandonly.com
Learn 1000 the most common thousand words, and you'll understand up to 80% of daily communication.
Not Applicable
$
8.95