I do various things but I think they're all pretty obvious. Yes, whenever I fly somewhere new I always ring to check for any particular guidance on approach to avoid known noise issues. When practicing aerobatics I move from place to place to avoid any cumulative inconvenience. On approach I wait until final to go full fine on the prop, and at a low enough speed and power setting that it does not howl up the rev range when I do so. I also strongly prefer to cruise as high as possible. Last Sunday, going between Northants and North Yorkshire, I spent most of my time between 7500 and 8500 feet, and I bet hardly anyone on the ground could hear me. (Also I had fabulous vis, smooth air, avoided all the gliders which were below the 4/8 cu. layer, navigation was actually easier as the ground looks so much like the chart, plus I had lots more options in the event of engine trouble. Almost everyone else en route was between 2000 and 3000 feet grubbing about under the clouds where it was hot, humid and bumpy, the air was murkier, and the gliders were thermalling. Why don't more people climb and cruise at higher levels?)