Which dictionaries reveal the commonly mistaken usage of a word (i.e. how NOT to use a word)?
I recommend this《小學生的國語辭典》approved by the Taiwanese Ministry of Education for their primary school students. It contains the following features:


语文帮手 (or language assistant) to highlight certain words that require
particular attention. For example:


  「人才」有才能和德性的人。例: ...
  請注意：指才能和知質義時「人才」也可以寫成「人材」：但是有木料或原料的意思時「木材」和「藥材」不可以寫作「木才」、「藥才」。

小提醒 (or small reminders) for listing synonyms (相似詞), antonyms (相反詞)
and active terms (活用詞). For example:


  「井井有倏」形容倏理分明。例：他井井有倏，很受上司的器重。 相似詞：井然有序。相反詞：亂七八糟。

追本溯源 (or trace the origin) to explain the historical background that
give rise to the word. For example:


  「上當」的本義是指把物品典當給當鋪。據說從前有一个讀書人以經營當鋪為生，店裡的股東欺負他老實,紛紛把不值錢的物品拿來典當高價，沒多久，當鋪就關門大吉了。於是人們就把欺騙別人的行為,叫做「上當」。



Note that the dictionary is written in traditional Chinese (繁体字) and that it is availabe on Google Books.