I start by front loading all the grammar study up to upper-intermediate level as fast as possible. Usually a premade Anki deck of a few thousand sentences will be available for this.

Vocab I pick up from native media. I just read or watch whatever I'm interested in, lookup words as I go and put them into Anki. I do full immersion and it works well as access to entertainment in my target languages is a key goal.

Pronunciation I pick up through a crap tonne of exposure to native media.

Conversation is through a combination of private tutoring and finding people who speak my target languages to hang out with.