[I_like_tacos]

I was curious as to everyone's thoughts here. This goes for not only Porsche, but all cars. I am a firm believer of the "if it ain't broke, don't ix it" philosophy. However, I do my routine maintenance. (oil changes, tire rotations, etc.)
My 2004 base is due for brake fluid change, mtf change, spark plugs, etc. The car is running great and I'm a little concered that my good intentions may cause a problem to pop us somewhere.
Am I being paranoid? Anyone else share my concerns?