"Thomas Edison tried and failed nearly 2000 times to develop the carbonized cotton-thread filament for the incandescent light bulb. When asked about it, he said, "i didn't fail, I found out 2000 ways how to not make a light bulb". But he only needed to find one way to make it work."
[Ben Gates - National Treasure]

Do i have to try and fail for 2000 times before i found out the one way?
Ok, i'm not Edison, it works for Edison, but doesn't mean it will works for me.