Sometimes you have to work hard to be PRO. This doesn't mean that you get paid to ride your bike, though that could be a nice option. Most amateurs over the age of 30 probably make more money than all real pros except the top 25 in the world.
As a cyclist it can consume your every waking hour. Things like ensuring that your sock height is just right, there is a good amount of white highlights on the bike, matching sunglasses - helmet - gloves and shoes. Making sure that you don't get a chainring mark on your inner calf. The right amount of head nod acknowledgement to a fellow cyclist.
So in my small way in addition to the aforementioned colour coding, there are 3 ways I enhance the PROness.
PRO food. Now I can be PRO on the inside.
PRO Oakley. Options are always good when it comes to eye protection.
PRO grip spares. Just in case the ones you have get dirty or something like that.