The Three C's Of User Story
There are three critical aspects known as The Three C’s of User Story, namely Card, Conversation, and Confirmation.
Fibonacci sequence and its usage. Fibonacci sequence in relationship to the Golden ratio. Weber's law estimations using the sequence.
SMART Tasks / Goals
Effective tasks are SMART poster. SMART acronym offers parameters to use when creating tasks.
INVEST in good User Stories poster. INVEST acronym provides a guidance on how to write user stories the way they are supposed to be written.