Yup, repetition is the key...I would take the top 100-200 list (there's one on drugs.com) and make/buy flashcards (ebay, nursing bookstore, amazon
) and try to learn 2-3 per day. Read them 1st thing in the morning, on your morning break, lunch break, afternoon break, while cooking supper....anytime you have 5 minutes...start small. Try to learn the top 10 in about 5 days. Then, in the next 5 days, add more...etc. The key is to always go back and make sure you remember what you've already learned.
It gets easier, the more you learn. You will start to see some patterns.
That's what works for me, anyhow.