Every discipline has its own good and bad habits, and in general we are all guilty of doing too much of what we like doing (eg. running, cycling, lifting big weights etc) and not enough of what we should be doing – rehab, looking after the body, addressing weaknesses, rest etc.
There is also always a big divide between different practices, and the divide is usually biggest when it comes to endurance athletes – mainly runners and cyclists out there! – and strength athletes – especially weightlifters and powerlifters. However, we can all learn so much from practices common to other disciplines!