My two cents are the following : avoid irritation as much as you can. This means doing as few passes as you can, if possible shaving somewhat less often, and/or shave less close to the skin, for exemple using an electric trimmer. You should wash beforehand using hot water, and afterwards using cold water, and then dry before moisturising. I personally use and beeswax and olive oil based cream but a lot of products will do the trick. Remember that every skin is different, and sometimes, you can do everything right and still have symptoms, so you should adjust your shaving habits to accommodate those