Fr. Philip N. Powell, OP, of Irving, Texas, has a good idea on what to do with a missalette:
"Put down the missalette, or as I prefer to call them Those Paper Destroyers of the Liturgy, or Those Menaces to the Word Proclaimed. Put them down. No, tear them in half, stick them in your pocket, and bury them near a soggy marsh."
He's right. Use a hymnal instead. Preferably one that doesn't change every year! Preferably one with music that is fit for use at Holy Mass.
Actually, the article is on how to listen to a homily. It's really good.
Still - yeah - tear the missalettes up and get a hymnal. (Sorry, had to! It's the musician in me! hehehehe)