Look around your room using a magnifying glass to search for fingerprints. If you're having trouble finding any, look for items that people frequently handle with their fingers like empty drink glasses or desk space near a computer.
Take a spoonful of talcum powder and sprinkle it over the fingerprint you've found if it's on a dark surface.
If the fingerprint is on a light surface, use dark cocoa powder.
Brush the powder off the area you've dusted slowly and gently. You should be able to see the outline of the fingerprint more clearly.
Place a strip of clear sticky tape over your dusted print, push down firmly and then gently peel it away.
Place the clear sticky tape on a piece of black paper, if you've dusted with talcum powder -- or white paper, if your've used cocoa.