Consistency
How consistent are you with developing your brand? If you have a brand that doesn##Q##t need updating that##Q##s find but let##Q##s look at Apple for example. They have done a BRILLIANT job of marketing their products and they change them every year. People want to look like they are advanced in technology so they want the latest iPhone, iPad or Mac computer. Apple doesn##Q##t have to renew their product every year but if they want to continue to make MILLIONS then they have to. Ironically, they keep creating the same product but they add a few more features and people eat it up. I still have my iPhone 4 because I think they screwed up (POST the death of Steve Jobs) with the iPhone 5 when they changed the connections. This means you not only have to get a new phone but all the brands like stereo systems, TVs, car adapters etc can no longer use the new iPhone. That was a mistake and an oversight that probably cost them sales. Nevertheless, how consistent are you with growing YOUR brand. Try new things, tweak what you offer and make sure you have some kind of feedback to give you results.