Every day find an article of approximately 250 words. Look in magazines or find an article froma newspaper on the web or in a library. Read the article through and highlight five words you do not know. The words you highlight should be important to the understanding of the article. Look them up and make sure that the meaning you find in the dictionary is the correct meaning as it relates to the article. Keep these words in your own dictionary and review frequently.
Taken from prfect phrases for the TOEFL by Roberta G steinberg.