1. Wrap them up pretty
Wrap mason jars in pretty fabric and hang them along your ceremony aisle. Or simply arrange a few on each table at the reception. Complete directions are on Once Wed
Image and DIY instructions from OnceWed
2. Fill them with little candles and acorns
Fill mason jars with votives and woodsy acorns, or smooth river rocks, or kitschy marbles. Just be sure to use materials that won't burst into flame, and make sure to use thick glass votives!
Image from Camilla at Home
3. Add Pretty Wallpaper and Arrange on a Funky Stand
I love finding interesting ways to use pretty prints, whether its wallpaper, scrapbooking paper, or colorful napkins. Here some mason jars have pretty fabric/wallpaper rolled up and placed in empty mason jars to add a pop of color while other mason jars hold flowers. All are displayed on a funky stand.