Hey there and thanks for the tip: http://blog.skritter.com/2011/01/did-you-know-starred-words.html
I've started to use it with 4 words that are (still) a bit confusing to me: 以后 yǐhòu, 时候 shíhou, 以前 yǐqián, 时间 shíjiān. That was the proposed order of the words. However, I'd prefer them to be displayed in a different order, say: 以后 yǐhòu, 以前 yǐqián, 时候 shíhou, 时间 shíjiān. Semantically "before" and "after" should be together, and also the other pair has some stronger connection between the words.
Wouldn't it be nice to have an option to order the list as you like?