You may really love the eiffel vases available but may not want to pay for floral arrangements for each table. You can alternate the vases and use other centerpieces as well.
This helps reduce the cost and looks great too!
If you are planning on assigned seating arrangements- this is a great time to get creative! Instead of table numbers, why not use pictures of family and friends? Do you enjoy traveling?
How about using places you've been to create table names. There are so many different options- have fun with it!