Follow these guidelines.
You will be happy,you did it.
Read with your eyes with concentration.
Listen attentively with your ears.
Understand what you read or listen.
Analyse what you read or listened.
Make sure that you have understood
what you read or listened.
Revise as many times as you can
what you understood.
Review at the end of the day
or at the time of going to bed,
What you have understood.
Within a short span of time
You can gain very good knowledge.