Don't do anything aside from removing the drain plug and unscrewing the filter. Don't blow out the lines with compressed air, don't disconnect the
oil cooler and shake it over an open sewer, don't drop the pan and wipe it out with paper towels, don't do any of these things.
Just remove the
oil plug, remove the filter, let it drain thoroughly, fill the new filter up with
oil, put it back on, and put the plug back in and fill 'er up.