For my cousins wedding I got her a " wedding memories box" from an upmarket stationary shop. It''s a wedding-ish looking box of thick cardbord in which to keep all the bits from the wedding which don''t fit into an album- pressed flowers, ribbon, cards, the cake topper etc. It''s just small enough to slide into a large bookshelf.
If your a creative type and this sounds like a good idea, it wouldn''t be too difficult to make one of these yourself.