It seems to me that effectiveness and efficiency are two main purposes of every method or technique used to improve in something. For example:

• Feynman Technique is a way to increase the effectiveness of our learning.
• Writing bibliographic notes is a way to increase efficiency in retrieving information in our notes taking system.
• Some Principles of Getting Things Done is to increase the efficiency in process tasks (see Why Getting Things Done should work)

Related Questions:

Related Topics:

• Personal growth

References