Welcome!
Downpipe, exhaust, fuel pump & retune is generally how most people start out and the results are worth every cent of the cost required.
Next up you could look at increasing the handling aspect of the car, this can be done through end link, sway bays, various bushings, lowering springs/struts/coilovers, etc and also brake pads/rotors/calipers/fluids/etc.
Plenty of different builds on the 3rd gen (08+) so you should be able to see what people have done.
Enjoy
