Acronyms

The initials or parts of words
can function like pieces of a puzzle.

So you get 
 acronyms

useful for short or remember.  

From  Greek

 ἄκρος or akros = ‘end’, y ,ὄνομα or ónoma = ‘name’

This video offers two acronyms like rote tricks,
explaining the possibilities of the verb to be,
 "ser" and "estar" of Spanish for students in English.

Vodcast. Ser y Estar nivel Spanish 2-2H from Juan José Vázquez on Vimeo.

 You can use your own acronyms
like strategy study.