One way to keep creativity fresh is to be creative in more than just the field that’s your job. Lots of magicians in addition to magic also do things like painting, photography, or music. Having another outlet for your creativity allows you to continually flex your creative muscle.
One of the creative things that I do is run a podcast called The Odd and Offbeat Podcast. In this podcast a buddy and I talk about strange news stories and joke about them.
The fun thing about this podcast is that it’s a weekly podcast, so I have to keep up on reading the news and writing jokes about things that I read. It also keep me sharper with my ad libs as we riff on each other’s jokes.
If you don’t already have a creative hobby, go out and find one!