Narrative Writing - Why Planning Before Writing is Important?

You Must Plan Before You Write - I am using narrative writing as an example here.

Topic:  SMOKING

Summary of the essay I am going to write: 

Drafting my introduction (which is my 1st para)- To give a BIG idea of my essay.  Smoking was my biggest mistake. My first puff - when I was in Primary Six.  Curiosity > Habit > became a terrible secret because I was then only twelve years old.  Inner struggle = There was no way I could turn around to undo my mistake.

Working out a draft for MAIN BODY PARAGRAPH 1 (which is my 2nd para)

I discovered:  Smoking once started very difficult to quit.

I did not have money to support this expensive habit.

Also very hard to buy cigarettes because I was under 21 years old

One thing led on to another > smoking changed me > made me steal to pay for cigarettes > got caught > embarrassed my parents, friends, teachers...

Working out a draft for  MAIN BODY PARAGRAPH 2 (which is my 3rd para)

A senior schoolmate introduced me to smoking.  Experience: very comforting / made me feel as though I was in heaven.  I felt very light / all the worries left me.  Everything seemed well at the start.  Only thing I did not know was the nightmare whihc had started to unfold.

Working out a draft for PARAGRAPH 3 (which is my 4th para)

pocket money - not enough for cigarettes. 

No. of sticks went up to about one box per day. 

Secret getting increasingly hard to keep.

Teacher get suspicious.

Warning: Habit > cannot be kicked away.

Working out a draft for Paragraph 4 (which is my 5th para)

Father caught me redhanded when spotchecked cigarettes in my schoolbag.

Severe scolding / threatened to cane me.  Tightened pocket money further.  I began to feel uneasy and restless w/o cigarettes.  Since no money > entered 7-11 store and stole.  No way to turn around.

Working out a draft for Paragraph 5(which is my CONCLUSION)

Caught by manager of teh convenience store for shoplifting.

Handed over to police.

Mother + Father very upset.

School Disciplinary Committee was informed.

Branded as Problem Student

Realised must change by kicking smoking altogether.