If you're not too deep in RTK give KanjiDamage[1] a try, I found it the best way to learn kanji, onyomi, some kunyomi and even picked up some useful/common jukugo - and it didn't took that much time, either (of course kanji rate heavily depends on free time/motivation).

I used pre-made deck in Anki, set up kanji in question to display stroke order on hover and used dictionaries to double check meanings/usage. I really can't recommend it enough.

[1]: http://kanjidamage.com/introduction