At what RPM do you normally shift gears. I seem to shift at about 3,000 RPM and I think that might be too high.

 

kinda a strange question. I mean shift at the appropriate speed for the acceleration rate you want. redline is there for a reason.. anything below it is not going to harm the engine.

There is also passenger comfort to consider, and lower rpm shifts are generally smoother.

Keep in mind that 99% of any damage to engine or transmission will be from trying to shift quickly.
Take your time changing gears... dont try to do it in less than a full second.. (count one mississippi). If you do a 0-60 you only have to shift twice, an automatic takes about3 tenthsof a second (300ms) to shift, the best SMG take under 200 ms so if you take a full second, you only take 700ms per shift longer. that would be 1.4 seconds on a 0-60. That is not ever going to be a problem,, unless you are racing.

Just take it easy shifting and enjoy the engine.. it can rev happily to whatever you like.