Oil all the usual spots periodically. Remove the one-piece crank every couple of years (easy to do), and regrease the bearings. Remove the front and rear axles every year or two and regrease the bearings. Put grease or oil on the brake and gear cables. Drip some oil into the cable housings. Change tires & brake pads when they wear out. True the wheels as needed. Keep some type of wax on the bike as a rust inhibitor. Try not to use steel wool to remove rust. Wet and soapy SOS or Brillo pad if you really have to. These bikes are built to last probably forever with a little simple, easy maintenance.