If you want to get tuned somewhere with a dyno, a Hondata, etc. is arguably the best route. If you want to do the tuning yourself, there are some other options like getting a EPROM programmer and some freeware tuning software and doing it yourself,.. You can also get someone to chip your ECU and tune it for you. This is nice but really not effective without a dyno if you are doing somewhat radical mods like big cams, etc., because you can't really predicively tune, only tune and check your results on the dyno.

Basically though, if you want to get tuned, you'll have to change to an OBD1 (92-95) ECU which can be chipped. Chipping is the process of using an external program or changing the already installed stock program.
OBD2 Honda ECUs can't be chipped and so can't have their program changed. Reflashable ECUs didn't come until a little later, you have an OBD2a ECU...