I would like to share with you a method I am currently following to improve my pronunciation. It all started with the observation that our real voice is not what we hear when we speak but rather what we can hear by playing a recording of our voice.
I then thought of using my smartphone to compare a recording of my voice with that of a native speaker. Proceeding by trial and error it is possible to achieve a good result and get very close to the reference pronunciation. Among the apps that can be used I recommend Speak & Listen that can be downloaded for free at shorturl.at/wALMO