For me, the sentence method works well.

1. I get new sentences from Glossika (they've thought through which sentences to present, and in what order — i.e., the curriculum). I get a few at a time — between 5 and 50, depending on how difficult the target language is / how close it is to one I already know.

2. I put those sentences into Mochi, with a template that automatically creates and embeds audio files of the target language.

3. I do the learning, memorizing, and reviewing of the sentences in Mochi using FSRS. I practice writing and pronunciation as I go along with the cards. (Using Mochi also helps me maintain languages I've learned in the same place.)

4. I return to Glossika and occasionally cram pronunciation practice from the human-generated audio there (Mochi is TTS, after all).

5. I supplement with TV and radio for immersion. When I reach a higher level, I start reading books.

6. Travel or living abroad, when I can.

The real trick is getting a couple new sentences and using SRS every day. Consistency moves mountains!