Not so much this, but rather that through the rest of the sentence (context), you are often able to figure out what the unknown vocab means. Next to that (in my case) you often remember vocabulary and it’s definitions/usage better through seeing it in context, rather than learning it standalone with mnemonics.
Encountering vocab in native material will give you a better understanding of how certain words are used and how they might differ from similar meaning words.
You could still make your own mnemonics based on the WK radicals and such if you’d want to of course.
You could take a look at the reader functionality in Kitsun. It focuses on minimizing the time spent on having to look vocab/kanji up and generating flashcards. You can paste in any article/book (or pick one of the short folklore stories already shared on the website) and click on words to see a bunch of useful information (and generate cards where needed). I think it is pretty beginner friendly
Here’s a short video showing it in action: