These great results come especially quickly if you do three things when reading.
Pay attention to interesting things: new words, phrases, and grammar structures.
Use your dictionary to learn about these interesting things. The more you use your dictionary, the faster your progress. If you don't like to stop reading (to look up a word in your dictionary),you can write down all the interesting sentences, or you can underline them in the book with a pencil.
You can learn the words and grammar in these sentences later.
Add these interesting things to a memo or notebook. This will give you everyday contact with correct English sentences. With such a memo, you will not forget useful words and grammar. Because of this, you can build your knowledge very quickly.