Each of the 15 wordlists contains 100 important words. The words in each list are arranged in 10 easy-to-learn groups. Within each group the words are ordered alphabetically. This structure prevents the confusion that results when you try to learn lots of words beginning with the same letter.
Make a commitment to learn one list a week. Go through each list and test yourself (or, better still, get a friend to test you) one week later to reinforce your learning.
Remember - work on vocabulary is never a waste of time. It pays dividends in terms of your final GRE score.
Word Focus is our systematic approach to advanced vocabulary building. Find out more about Word Focus.