Summary: Bad habits are the worst time-wasters in piano practice. Most bad habits are caused by stress from practicing pieces HT, that are too difficult. Many of the bad habits from HT practice are difficult to diagnose, which makes them that much more dangerous. Clearly, the best defense against bad habits is HS practice. Non-musical play is one type of bad habit; therefore, don't forget that musical play starts with HS practice. .. http://www.pianofundamentals.com/book/en/1.II.22
