There are a lot of things you can do. Depends on the money that you want to spend.
A good dyno tune and chip will help, but I think that you are too close to stock to really get the full benefit of that.
You might want to think about a heads/cam/intake combination that suits your driving style and budget. The 5.0L engines have tons of aftermarket parts.
I would recommend that you change out your gears to 3.73's. That will bring the biggest change to your times.
Pullies are real cheap and add some power too.
You must be a little more specific and you'll get tons of responses.
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1995 Mustang GT