It's also a great idea if you move rhythmically - you can dance, work out, jog or even do your house chores as you listen to the grammar chants.
While you concentrate on the rhythm, dance and sing along, you stop analysing the language and perceive it unfiltered and effortlessly, like a child. The pleasure you get from the music and the movement reinforces greatly your ability to memorize. The melodies and rhythm used in my grammar chants are very simple and that creates an effect of an "ear worm", a song that gets into your brain as stays there foverer.