Three diagrams 

They help you to draw your topic repeatedly into significant parts

Exemple:

Mass communication

 

internet

Film

Television

Radio

Advertising

 

 Television

 

Reality

comedy

News                                                                 

Soaps

Sports

quiz

        

Soaps                                                                               

day

evening

Evening

Woman in

Man in

Relationships

 

Relationships

Friendship

Business

Romantic

Family

Romantic

Same sex

opposite sex

 

You can use this scheme with any other topic to organize your mind about the topic you want to talk about.