I take all mine from the crucifixes down and at our Lenten Fair, they burn all the palms inside a huge piece of foil, let it cool down, and wrap it up for Ash Wednesday. Gives us a lot of ashes.
Being Catholic: Sacred Things, [Holy] Water
Being Catholic: Sacred Things, [New] Fire, Paschal Candle
Being Catholic: Sacred Things, Holy Oils
Being Catholic: Sacred Things, Crucifixes and Crosses
Being Catholic: Sacred Things, Sacred Images: Statues and Other Icons
Being Catholic: Sacred Things, Incense