That is a very good point that I am sure effects everyone regardless of how long they have been in business for.
the one downfall in being in business for so long you tend to get complacent and stop doing the thing that made you successful to start with.
What kinds of things do you feel you stopped doing? I bet once they were identified it would be hard to ignore them.
Also, why do you feel you stopped doing them. I bet the reasons behind that are fascinating.