Using these 3D wall stickers is super easy. First, take the template and fix it on the wall following the instructions. Look for the numbers on the template and tear the paper along the dotted lines. Then, gently stick the wall stickers into the empty parts of the template. After they are in place, peel off the protective film. At last, remove the template. As for precautions, remember that there could be a small color difference between what you see on the screen and the real stickers because of monitor settings. To maintain these stickers, just use a soft, dry cloth to wipe them if they get dirty. Avoid using sharp objects that might scratch the surface of the stickers.