The formula for innovation success is different in each set of circumstances, but has some consistent themes: time, determination, patience, skill, top level support, collaboration, a combination of analytical and spatial skills, engaged participants, process discipline, and tolerance of failure.
The reasons not to innovate are far more creative, but have the common theme of finding an excuse not to stretch. The link is to a list of the 100 most common excuses, it is a bit of fun, but there would be few excuses lisited that we have not all heard at some time.