Very useful tips. I never thought about it that way.
You are learning Portuguese and Spanish at the same time? Wow, how do you not mix up those two languages? That would be torture for me lol. That is why I learned Spanish to fluency first, and now I am tackling Portuguese because my Spanish is close to B2 / C1 now.
The best tip I had told me to repeat a sentence 200 times or more.
1) I hadn't previously realised it would take so many repetitions because when you have a lesson, you only do a few reps and then you move on to the next sentence.
2) I prioritise listening and speaking skills. In Anki, I only have sentences. When I set up Anki, the initial card only has the audio which repeats ten times. I do this because: a) if I don't catch the sentence the first time, it auto repeats. That's more convenient as I don't need to keep pressing anki to repeat the audio. If after ten times, I still don't get it, I can repeat the listening another ten times!. b) it gives me a greater chance to catch the rhythm of the sentence (I use native speaker recordings) for listening
3) My anki answer card repeats the audio again ten times with the words. My aim is to shadow that audio ten times. If I feel I am not good enough, I can easily repeat the audio and get another ten reps to shadow or more. That way I can build up the sentence reps fairly conveniently or just keep to ten reps if it is a sentence I am familiar with.
Quite possibly the tonal languages are harder. I notice that people's written skills are usually better than their verbal and listening skills. Even though many times we learn a new sentence by seeing and reading it at the same time，spoken skills usually lag behind. But I want to talk to people more and then later catch up with the reading and composition.
My anki question card means I must fully concentrate on the listening input.
The answer card has the written Chinese, the translation and whatever. Those are really just aids. I just glance at those and then try not to look at them when doing those extra repetitions when I shadow.
The pain is making the anki notes takes up a lot of time if you put many sentences in. But you get quite a lot of satisfaction in getting your voice closer to native like rhythm, tone and connected words after such specific practice.