Earlier, when I read an English book I always looked for every new word in my dictionary. But! It was very uneasily. Your reading was moving ahead like a tortoise.
After a wile I have read some clever advises 🙂 . You need to look in your dictionary if you cannot guess the meaning of that word and the sense of the sentence is losing. If you can guess or understand what that sentence about – do not use any dictionary. Then your reading will be much faster.
Now I use my dictionary when I write something. And for learning I watch English-Russian animations/films/cartoons. First – in Russian, then – in English. I can re-watch English version five or more times, repeating hard moments. After that I fluently understand 92 % of the animation and take the next one. This is the method I chose. How about yours? 🙂