I’m taking the N3 in december too and just found this thread (you guys make me doubt my decision now, it seems so much harder than I expected. Probably much more of a jump from N4 than I thought)
In terms of my daily routine, I do WaniKani every day (obviously), which includes all lessons and reviews that are outstanding. I give myself the challenge to get 0 and 0 before going to sleep every day. I also keep a grammar diary, where I tackle 2-4 grammar points a day (depending on how well I understand them or already know them the firs time around) and then do repetitions for about the next four days (which includes A LOT of writing, but hey).
And then (mainly just because I really like the stories and they provide quite a challenge for me still) I work through a few of Souseki’s ten nights short stories for about half an hour a day (both listening and reading).
That’s my ideal daily japanese ritual, but it’s quite time consuming, so sometimes I find myself skipping certain parts when I’m too exhausted from work or something. I also try and read a few articles on NHK easy news a week.
What I’m really worried about is my listening, as I haven’t really found anything that works for me yet (apart from the Souseki short stories, but that doesn’t provide enough diversity of course).
Sorry for the long post and I’m not even sure if anyone even still follows this, but as it’s just under two months away, I figured it might be useful to revive it a bit