I wouldnâ€™t recommend special CMAT preparation unless youâ€™re focused only on Tier 2 colleges and have given up hope on getting admission to the top B-schools in the country.
You should prepare for CMAT the same way youâ€™d normally prepare for CAT. I would suggest looking over previous year question papers as a reference point. Besides that, I donâ€™t find any special tips and tricks to give for CMAT preparation. You can follow the link below for tips for CAT preparation.