- learn complex sound from the back, not from the front
Höchstgeschwindigkeitsbegrenzung (speed limit). Now what? Each of the sounds isn’t particularly hard, but how do you get your tongue to jump through so many hoops in a row? Go backward. Say the end of the word, and then add one letter at a time until you can say the whole thing.
Back-chaining is, incidentally, the cheat code for tongue twisters. You can use it to combine words in the same way you would use it for letters.
You may wonder why we’re going backward. After all, we could start with “v” and progress to “vz,” “vzd,” “vzdr,” and so on. Indeed you can, but in my experience, it doesn’t work as well. By going backward, you practice the end of the word every time you add a letter. This makes it easier and easier to finish the word correctly and automatically.