How to get more power for my Pontiac G5?

I want my car to have more horse power or to be quicker off the line. What could I do to it? Cold air intake? Turbo? Supercharger? performance chip? I don't think I want to do a turbo or super because they are a little spendy and I'm worried they might mess up my engine. I'm also open to any suggestions on what else I should do to my car besides performance. A little more about my car is its a 2007 Pontiac G5 GT, 2.4L Ecotec.
 
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