These ideas/images have been shamelessly nicked off of Alicia's blog.

But they are just too neat to pass by.

First up, the seating chart for the reception written on the glass panes of a couple old windows.
Second, the guestbook is an old-time typewriter.
Third, a box of old random postcards that the guests can take to post back to the bride and groom with memories and well-wishes.
Then these awesome mason jars as lanterns.
After that an idea I am absolutely in love with, lawn games such as boche and croquet.
And lastly, pretty cute signs for the back of the bride and grooms chairs.