[anaisbetts]

A great way to passively improve for >= B1/2 level is to listen to English-language podcasts (or whatever other language you want to learn). It doesn't matter if you actually pay attention or care about the subject matter - the point is to program your "lizard brain" as to what native pronunciation sounds like for different words, the part of your brain that works when you're speaking without thinking about it.

Of course, it won't magically make your pronunciation perfect, but it will help your "speaking without thinking" pronunciation and it's Easy to do