We don't become mediocre all at once, and we rarely do it on purpose.
Products that are remarkable get talked about.
The one path that never works is the most common one: doing nothing at all.
Someone can always do your job a little better or faster or cheaper than you can.
When you set down the path to create art, whatever sort of art it is, understand that the path is neither short not easy. That means you must determine if the route is worth the effort. If it's not, dream bigger.
If you love writing or making music or blogging or any sort of performing art, then do it. Do it with everything you've got. Just don't plan on using it as a shortcut to making a living.