What are some guidelines for building knowledge and understanding?

There are many guidelines for building knowledge and understanding and some of them include;

The first thing for knowledge building is "learning the fact" which constitutes the basis of any subject. Second "evaluate the facts and everything using scientific method" and lastly the key to knowledge building id question everything as why? The last part is exactly in line with the ancient basis of today's Royal Society also which was based on the line "nullius in verba" which means "on no one's words".