Reading along with matching audio without pausing.

Reading something without stopping or looking up words.

Focused listening to something (no text) without pausing.

Writing in your target language without using a dictionary.

Speaking on your own, for example, into a camera.

Repeating along with audio in real time, no stopping.

Having a conversation with someone.

Speaking inside your head, along with audio or while reading.

Listening to audio with partial focus, maybe while doing chores or walking.

Reading a text with both your target language and native language.

Practicing singing or the lyrics to a song in the language.

Focusing on noticing, rather than understanding.

Listening to audio and reading aloud with matching text.

Spending time with a group (4+ people) all using the target language.

Spending time in the world with at least one other speaker of the language.

Spending time in the world with a speaker of the language, using crosstalk.