i think first important thing to learn anything is interest,involvement and vision!
~~~ak English fluently without thinking about the rules and logic.~~
You need to mimic correct sentences over and over again.
Do you have to memorize English or do you have to understand the English to speak it? Let's first think about how people learn their first language. When you were little, you listened to your parents speak and you copied them. Over the years, people have tried to learn English like they learn a concept or a theory. They try to understand the meaning behind each sentence and try to put them together through logic. If you are studying to pass the GMAT or TOEFL or any other test, then you will have to try to understand every word of every sentence and know why each word is in a particular place. But when you speak English, you don't need to know any rules. The more rules and logic you think about, the harder time you will have. The best way to learn to speak English is to memorize. First, have a sentence that is correct. Listen to the sentence, repeat the sentence over and over again until it becomes a part of you.