Use a paper clip as a bookmark.
This simple and creative idea will help you keep track of your place in a book. All you need is a paper clip! Simply open the paper clip and slide it onto the page you want to mark. When you're ready to continue reading, the paper clip will be there to help you
A paper clip is a tool used to hold sheets of paper together, usually made of steel wire bent to a looped shape. Most paper clips are variations of the Gem type introduced in the 1890s or earlier, characterized by the one and a half loops made by the wire. Common to paper clips proper is their utilization of torsion and elasticity in the wire, and friction between wire and paper. When a moderate number of sheets are inserted between the two "tongues" of the clip, the tongues will be forced apart and cause torsion in the bend of the wire to grip the sheets together. They are usually used to bind papers together for productivity and portability.