When will I stop making Silly Mistakes?

Today, I thought of vomiting my feelings out about Silly Mistakes.
Silly or careless mistakes (whatever you may call them) have always assumed a special position in my life. Now its almost as if they have become my friends, a part and parcel of my life...haunting me all out.
Many a times the toll of these mistakes is light but sometimes heavy...but always better if you can avoid them.
I often think whether the mistakes are careless or am I ?

In the X Board exams I applied the formula for the volume of a sphere as
4/3 pi r*r ...LoL...lost 5 marks for this and got 95 . OK...doesnt matter much.
I would have sacrificed hundreds of marks to these mistakes...and dont know how many more would I...

So this time I tried to find out the cause behind these mistakes discerning something from one of the latest happenings.

Yesterday, we were shown Computer Graphics II Mid Term papers. I was quite confident of getting 10 on 10. Neeta Nain ma'am checked the first 2 questions and I got full marks in there...then came the 3rd one. In the 3rd question we were given 8 coordinates of a polygon and were asked to give the pixels that will be filled in by the polygon filling algorithm.

Now lets take the life into the reverse gear to see how I proceeded to solve this question in the examination:
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I marked all the points given on my answer sheet with the utmost attention. Then as I was joining them one by one a deja vu struck me which soon converted to a nostalgic feeling - hey i used to do the same thing in the newspapers.

Finally I got quite a decent looking polygon. I applied the filling algo and wrote down all the pixels that would be filled; confident of getting it all correct
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Now the denouement and the climax. I got this question completely wrong... :P
How ? Why? Where? did I make the mistake ! How could I screw up this simple question ?

Answer:
I had joined the points in a random order forgetting that they had to be joined only in the order they were given in the question paper. Hence I got a completely different polygon and completely different answers. And the reaction of the teacher...U can imagine :P

ANALYSIS :

Lets analyse here a bit and think what could be the possible reason behind commiting this trivial mistake.
Remember the deja vu feeling....immersed in a feeling of nostalgia, I cherished thinking about those sweet days of my childhood...that was the point where I lost my concentration and I commited another Silly Mistake !
Had I remained focussed and stoic, I could have possibly avoided it.

Uptil now the consequences of these mistakes were light weight but WHAT IF
while working for a multi national firm I screw something up in a financial deal.
I could possibly lose my job.

Thus at this juncture of my life it has actually become imperative that I stop making these Silly / Trivial / Careless mistakes and I believe better concentration and focus are the way out...the challenge lies ahead.

COME ON Silly Mistakes !