How can one effectively practice and master the 3 against 4 polyrhythm?

To effectively practice and master the 3 against 4 polyrhythm, start by understanding each rhythm separately. Practice each rhythm slowly and steadily until you feel comfortable with them individually. Then, try playing them together, focusing on keeping a steady tempo and counting out loud. Gradually increase the speed as you become more comfortable. Consistent practice and patience are key to mastering this complex polyrhythm.