Clean the floor tile thoroughly with soap and water to remove traces of oil and dirt. Sand the top of the floor tile slightly with fine-grit sandpaper to roughen the gloss of the tile. Wipe away the debris from dusting with a damp sponge.
Lay your floor tile on a flat working surface. Apply a thin layer of Mod Podge to the floor tile with a sponge applicator, available from craft stores. Brush the glue on in a single direction, maintaining even pressure.
Press down your crafting material on top of the Mod Podge. Possible crafting materials include a special photograph that you want to showcase, a piece of material from a favorite item of clothing or a collection of mementos that you cherish. You will have a few minutes to arrange the items before the Mod Podge begins to harden.
Roll over your crafting materials with a mini roller to smooth them down onto the floor tile and eliminate any bubbles that are trapped beneath them. Allow the items to rest for about 30 minutes so they will have ample time to adhere to the floor tile.
Ensure that the corners of the mementos are adhered firmly to the floor tile. If the corners are peeling up, dab a small amount of Mod Podge underneath them. Press down the corners and hold them down for about 30 seconds to make sure they are secured.
Brush another layer of Mod Podge over the photograph or other mementos to seal them and protect them from damage. Spread the Mod Podge evenly over the floor tile, brushing in one direction only with the sponge applicator. Allow the floor tile to dry for about 15 minutes.
Apply a second layer of sealing Mod Podge to the floor tile. If you brush the Mod Podge on in the opposite direction of the previous layer, it will create a light texture over the mementos. If you brush the Mod Podge on in the same direction as the previous layer, there will be no visible texture. Allow it to dry for 15 minutes.
Glaze the decorated floor tile. Apply a layer of clear glaze over the dried floor tile with the sponge applicator and allow it to dry for about 20 minutes. If you would like a greater shine, add a second layer of glaze.