Make a photocopy of the original newspaper because the original newspaper will yellow. The paper may also deteriorate over time if it's stuck in a frame.
Purchase a newspaper-sized frame. These frames are customized to the exact size of a broadsheet, which is the full front page of a newspaper. Some frames even come in a half-broadsheet size.
Cut the photocopy to size so that it fits within the frame. Apply pieces of double-sided tape to the corners on the back of the photocopy. Attach the photocopy to the frame's backing to keep it secure.
Store the original newspaper flat and in an acid-free container. Store the container in a dark, dry area that's climate-controlled; heat and humidity will make it quickly deteriorate.