Select a random word from your dictionary. Study the definition, meaning and example sentences provided in your dictionary until you are certain of its meaning and usage in a sentence.
Create three sentences using the new word and write them down.
Use the new word in a sentence while talking to someone. You may have to be creative, especially if it is a medical term or very strange-sounding word. Bring up a news topic or mention a study you read to justify using the new word in a sentence.
Repeat Steps 1, 2 and 3 daily. Try using combinations of your new words in conversation regularly when any opportunity presents itself.