things to save gas and get more performance?

A cheap up grade depending what what car you have would be a K/N Air filter
heres there website:
http://store.knfilters.com/

as far as the throttle body or idle air control valve for the throttle body i usually use some good old brake clean and scrub it down with a clean shop towel. Idle Air control Valve is a little different.

chang plugs and wires and air filter

Wow – you want your cake and eat it too – better fuel economy and more performance.
I guess it’s all summed up in proper maintenance – replace a dirty air filter, for instance, and you get both, better performance and better fuel economy. The same applies to a lot of basic items such as the tire pressures and proper alignment, prompt repair or replacement of faulty sensors, eliminating unnecessary trips, taking routes that minimize traffic signals and congested roads whenever possible and, last but not least, anticipating stops and accelerating smoothly.

If you want to get more air in, its smart to make more air go out, or easier at least… a good air filter and a good muffler make it easier to breathe, more horsepower and better fuel economy…. good air pressure in tires can make a difference over time and drive less lol

Some Go Faster Stripes might be the cheapest approach.

As the other guy said you can use some brake cleaner to spray the throttle body and Idle Air Control motor. Although i don’t know what vehicle you have but some ford coat them with a special material. other than that basic maintenance helps…fuel filter, pcv valve, spark plugs, and wires(if applicable) etc.

Where were all the LeAnnes in the world when I got married??

Having performance and saving gas are mutually exclusive. If you have power, you will always have your foot on the skinny pedal on the right.

Do what she said.