While planning your wedding you are no doubt bombarded by more advice than you can handle, but the bottom line is you have to make your wedding personal. This is your day make it look like you, not your friends, your mother-in-law, or the latest hot celebrity. Your wedding should reflect your groom's and your personality.
The key is in the details, the small things that reflect who you are. My sister attached little silver charms that said "love", to almost everything. She then used similar silver charms that said "thank you" to the party favors. She carried the theme of the small charms with red ribbon thru out her wedding. It tied everything together, and reflected her personality, and likes. Find a theme that fits your personality and go with it.
Another little detail that often gets overlooked is the stamps you use on your wedding invitations, and on the return envelopes. The USPS offers wedding stamps that are much more attractive than the standard issue stamps everyone gets. You can look at the stamps at http://shop.usps.com , then search for "wedding". (Blog credit Paperjam) The small detail make all the difference.
A fun idea for your centerpieces is to incorporate your engagement pictures, using your pictures helps make your wedding more personal, and gives guests that may not know both of you a look into your life together.
Be creative and have fun, its your day.