Once you have chosen which words to learn, you next have to decide how you are going to learn them. Here are a few ideas:
write the words in a notebook
(with their translations or definitions)
write the words and definitions on small cards
(advice on how to do this)
say the words many times
(if you have an electronic dictionary you can hear how the word is pronounced)
put the words into different groups
(you could use a graphic organizer)
write them in a file for use with a computer program
(such as Quizlet or the one on this site)
make associations
(in pictures or with other words)
ask someone to test you use the words in your own speaking or writing