Shifting at what RPMs consistantly will start to hurt vehicle life?

[ripto]

So I've typically been a pretty boring driver. My first vehicle was a '98 Dodge Ram 1500 in '05 til 6/2012 when I bought my '12 Focus SE 5spd. The Dodge had engine issues and knocked like crazy so I was always babying it. That driving style carried over to the Focus. For some reason I'm under the impression that if I consistently shift at high RPMs, I could be reducing the life of the vehicle. I typically shift around 2500 RPM, rarely going above 3000-3250 RPM. I don't know what it is, but I've always been cautious about having the RPMs get too high.

Is it a blanket statement to say as long as you are not red-lining, the vehicle can handle it without worry (assuming the engine is at the NOT)?

At what RPM do you typically shift from gear to gear?