I find the 2-column word matching exercises to be detrimental to my progress. I can often match words that I wouldn't have been able to translate correctly. But after matching them, I can get the correct answer when the flashcard comes up (although it should rightly be reset because I didn't remember it a few seconds before). What I do is that I always hide the right column with my hand so I don't see the answers, and treat the words on the left as if they were flashcards. When I lift my hand, I match them up. I need to keep a mental tracker of which words I didn't get right, so that when the actual flash cards come up, I can swipe them left to reset the counter.