Without being a dick like many others I am going to answer your question to the best of my knowledge. If you have some money to spend you might think about doing either a motor swap or a turbo setup. There are companies out there who make kits for swapping in motors where you almost have no work to do but put the motor in. Likewise, there are many companies out there who offer bolt on turbo kits for almost all of the honda motors. Or you could choose to custom build your turbo setup, to each their own. But if you dont have alot of money to spend some easy hp ad ons are intake (cool air, or short ram its all a matter of personal preference), catback exhaust (Apexi N1 is a very popular exhaust for Hondas, and most imports), you can also chip your car, run a small shot of nitrous, or build your motor (cams, pullys, valves, rods, springs, etc.).
There are so many ways to make your car faster. For starters try checking out
www.nopi.com,
www.6generationcivic.com,
www.hondatuning.com, and do a google search for honda forums that might be more helpful.