@jws I don’t really care for learning handwriting, just pronunciation and recognition (which allows me to use IME easily.) I can hand write any of my learnt kanji, but I barely write English these days, let alone Japanese, so I don’t optimise for it.
@jws Using them a lot, in regular conversation, as creatively as I can muster. Despite many opinions to the contrary, I don’t think there are any “quick hacks” you can easily apply. It’s more of a brute-force learning procedure. Just try to make it fun.