Make invitations funny and put humorous quotes in it. Don't just invite your friends for your birthday with the normal request to join you for your birthday. For example, instead of saying don't get any gifts, say that they aren't allowed to come without gifts. Let people look forward to your party once they see the invitation.
If you decide to have a theme for the party, don't forget to mention it in the invitation. Remember, when you start decorating the venue, everything from the centerpieces to the colors you use, has to be related to the theme.
Suppose you choose the pirate theme. You can then keep hints relating to the world of pirates. This is surely going to be very exciting, isn't it? What's more? You can also write all the hints in the pirate language.
You can also gift everyone a book (this can again be related to the theme) or maybe just a unique accessory. If you don't have the time to think of something different, go to a good stationery store and check out their new arrivals.
Now that you know how these unique party ideas, you can throw an amazing party this year. Make sure you plan everything in advance and not leave anything for later.