Manga-Making: How to Create An Original Story Plot

My definition of original manga is it MUST be UNIQUE, FRESH AND ENTERTAINING. There are unlimited ideas of
how to make original manga plot that no one will ever think of it...so I'm going to teach you how to make it!
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(1) What do you like? (Can be ranged from objects, people, hobbies, sports, game etc)
Well the reason why I ask you this question is because I want you to write / draw something you enjoy a lot If you like more than one thing, you can combine them to create a masterpiece!
*** Sample Answer***
I normally enjoy clubbing with my friends and I love listening to music. During the last summer vacation, we visited some of the nightclubs in the Mediterraneans and I quite like it (except the hangover part!). So since DJs, nightclub & music is something I like, I can create a plot about a music-loving person who wants to become the world best DJ so (s)he competes with other DJs in the nightclub, competition etc
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(2) Which timeline you want to set the plot in?
If you were in the timemachine, which year you would like to travel to??? Also make some research if you want to make your plot realistic.
*** Sample Answer***
Well, since I want to be realistic, why not set in 2002 (random guess)? It's going to be ridiculous to set in the Middle Ages: peasants might burn DJs if they hear their music...you never know...
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(3) What type of world does the plot occur in?
It depends what type of mood you wants to set in your story plot. Also, it depends which readers you are targeting on. This time you determine the genre(s).   
*** Sample Answer***
Well, I like my story to be targeted on young teens, so I want to add a little comedy inside my plot. Also I want my plot to be set in the real world, as I want my protagonist to travel all around the world to compete with other DJs (like Beyblade, Yu-Gi-Oh!, Yakitate Japan etc). So the genres of my story is music, adventure and comedy.
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(4) Describe your protagonist and his/her goal.
If you want it to be original, you must make a original character!! It doesn't have to be a character that everyone like. Also your protagonist does not have to be a good person...you can even write a story about a evil person (this idea is still fresh)... If you're planning to make optimistic, food-loving, stubborn, stupid and straightforward character like Goku (Dragonball), Naruto (Naruto), Luffy (One Piece) and Natsu (Fairy Tail), then FORGET ABOUT IT!!! In a short term, everybody will get bored of these type of characters since these personalities are repeated over and over again for MORE THAN 20 YEARS!!!
*** Sample Answer***
Well, I want my character to be a pessimist and hardworking. He enjoys whistling (showing a bit of a carefree personality) and he is neither clever nor stupid, just average...After gaining supports from his friends, he decided to be the world best DJs.
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THAT'S ALL, I think... GOOD LUCK with your manga-making process

Due to workload, I am unable to help you with your manga making process. I'm really sorry about that

But here are the resources / articles I found useful (and even better than my poorly written journal):

for rpg, shounen, fighting, science fiction, fantasy plot
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Link 1 , Link 2 , Link 3, Link 4, [link]
for shoujo, romance plot
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[link], [link]
other helpful ways to get the decent plot
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[link], [link], [link], [link]