Revision
How many words I should revise?
Ideally, you need to revise all the words that you have learned in the previous sessions. Give priority to words on which your mastery is low.
Should I revise the words every day?
While you are learning an unknown word for the first time, focus only on learning the word thoroughly. You need not spend time learning the synonyms. When you revise the word subsequently, you can start learning the synonyms.
