Mason jars have such a range of possibilities. Drinking glasses for an informal affair, candle holders for a more elegant country look or as small vases.
Another great item to use that can make huge differences in decor is fabric. Pick a print you love and work it throughout the entire wedding. Drape it, make table runners to add some pop to otherwise simple tablescapes, wrap favor boxes in fabric and set on top of crisp white napkins for an added splash of color on the table, and so on and so on. I love the four Lilly Pulitzer prints in the middle because of the vivid colors. They would really pop with some other brights mixed in and incorporated throughout a wedding. Geometrics are also a great choice. They would be a little easier to work with and can be combined with a number of different design elements to create a really cool look.
I am all about some great inexpensive ways to make a wedding a little bit more affordable. Any inexpensive items you used at your wedding? Let me know. I always love hearing new ideas!