All of these tips are great and should be adapted to your habits. However, number four is a particularly pet peeve of mine. No matter how small or large a gym is there should never be a need to break another persons set unless you see their pattern and know that it won't take them off stride. On second thought just find another machine.
Peace Be Still... Jesus is and will always be a comforter in times of the storm. Matthew 8:23-27