Make small cards with the words you want to learn written on one side, and the same word written in your native language on the other side. Place all the cards "native side down" and as you put them down and see the foreign word, say aloud the word in your native language as quickly as you can. It really helps burn it into your brain.
For me personally it is through repetition and constantly using/applying the new words into your work. By using the word in your writing you should eventually have a great grasp on it and manage to comprehend it.