you can listen to some English songs and watch some English movies to improve your English-speaking skills .
Then you may meet into some difficult but necessary words ,after knowing how to spell them and write them ,you can look up these words in your dictionary ,then remember them .
By doing these,you can know more difficult words which you can't remember well in normal learning ways
The third ,you could ask your teacher for help ,teachers have more knowledge than us
Hope my advice helpful to you!