How can i Improving mpg ??

I have CG 01 126000 M
How often i should do tune up? I didn't do ny since i bought it on Sept04

Change plugs and wires every 100K miles. Distributor cap and rotor too if you have them. Change engine oil and filter at least every 5k miles, flush the radiator and add new fluid every other year and change all the hoses and belts every 4 or 5 years. If you have a timing belt change it every 80k miles. If it's a timing chain leave it alone. This will get you started. Check your manual for more info or any number of websites.

Keep your tires inflated a few pounds over what the sticker says on the door frame and learn to anticipate stop lights. If you see a red light ahead or one about to go red, let up or take your foot off the gas pedal. When green pull away at a reasonable speed. Find a good compromise between distance and traffic. Heavy traffic eats gas because you are on and off the pedal so much.