There are loads of features in the Learning Center, and we try to add some when we can.
One of my personal favorites is the Line By Line Audio and the Voice Recorder. So, I like to listen to the original line and try to record my voice to improve my pitch accent. Comparing the two is really helpful.
But recently, I've been trying to improve my speed when writing Japanese.
So I've been sitting down with a pen and paper and click one line of the Line By Line Audio and try transcribe it. i think i'll start timing my transcription times soon. i'm actually picking up a lot of new kanji this way too (for example, i didn't know how to write 褌 until i started doing this). so i think this process is helping my (1) listening skills, (2) writing skills, and (3) adding more kanji to my repertoire.
that got me thinking...
do you guys "misuse" the learning center for other purposes?