I, like everyone i expect, have some annoying issues with visually similar Kanji. Especially if i am trying to rush through a review session.
For instance, I was getting really bogged down with the following -
時・持・特・待・詩・得・侍
time / hold / special / wait / poem / acquire / samurai
It actually took me a while to realise the reason I was getting them wrong was because each was so similar to the other (at least to me!!).
I decided to sit down and concentrate on this group of visually similar kanji, in-particularly by writing them, and learning the correct stroke order. This allowed me to concentrate on the differences between them - and acted to reinforce the knowledge.
This might seem an obvious thing to do, but thought I would share my success in the hope it could help someone else.
One of the issues with wanikani in isolation from other learning methods is that you only learn the the memory recall one way - ie - you can recall the meaning from seeing the kanji. However this does not necessarily result in being able to ‘visualise’ the kanji, when only given the meaning.
To really cement kanji in ya brain, recalling the memory the other way round (for instance by writing down when given the meaning) is really important IMO.
Unfortunately I don’t have time to use Kaniwani (or similar resources) which do this - and so have decided that I will deal with problem kanji as I realise they are a problem, by learning how to write them.
anyone else have any similar kanji / radicals they have / had issues with? and more generally are people learning to write the kanji as they do wanikani? 
