Joe Chiccarelli shares two habits he uses on every mix to keep reverbs from cluttering the center channel. The first is pre-delay: pushing the reverb tail away from the source so it registers as depth rather than smear.
The second is stereo spreading. Running reverbs and delays through an M-S or frequency-shifting plugin pulls the energy to the sides, leaving the center clear for kick, snare, bass, and vocal. He demonstrates with the spreader bypassed and engaged so the difference is easy to hear.
The underlying principle is center-channel focus: every diffuse element you push wide is space you protect for the elements that need to anchor the mix. Both moves are quick to set up and apply to any genre or session.