[Tango-L] Practice can be a waste too.

[Krasimir Stoyanov]

It is extremely important that people practice (let's just call it) the right thing. No matter if the dancing is considered practice. Or just the lessons and seminars. That is why dancing with good partners improves you. Dancing with bad partners is not going to make you good, even if you spend 20 years dancing 6 hours a night. Of course, people learn to protect themselves, but that's all.
So what really works is the right teaching - not oversimplifying and not overcomplicating matters - and then, good partners to dance with. Sounds simple, but it is not unfortunately.