Greetings from Finland! ('94 Toyota Celica)
 

Hi! My name's Christopher, and I drive a '94 Toyota Celica

Why celica? 175BHP, and consumes around 29,4mpg. (i do not think this is even bad with my aggressive driving)

I wish to better my fuel economy :-)

Driving style is the most important thing in a sports car unless you dont want to lower your cars performance?

If you accept some mods hot air intake, grill block and narrower tires are propably the easiest mods

Welcome to the site Fingie.

I'd definitely start with tweaking your driving style. Check out our list of tips here:
100+ Hypermiling / ecodriving tips & tactics for better mpg - EcoModder.com

Welcome!

I see you don't have fuel economy instrumentation -- also VERY highly recommended. Due to the car's age, you would need to use something like the MPGuino.