The laser jet outof paper

In the printer market there have thousands difference brands and models ink-jet and laser-jet printer, how can we eleminate their trouble to the minimon and extend their lifetime as long as we can. The paper tray for the ink-jet printer most are open top style, therefor very easy to catch dust and other cbject and cause paper jam, paper skew, paper rinkle, some cases are easy to remove some don't,when you have those case happen, the first thing you have to do is check the paper tray inside of the bottom , looking for somethings it not belong to, then clean up the paper feed roller with rubbing alcohol. Now how can we prevent it happen, the way is when finish printing use something to cover the tray. when paper jam occure, remenber, never pull the paper opposited way, you have follow the direction let he paper go forward, otherwise you going to damage the paper senser.
How about laser printer, the laser printer it's structure much stronger than ink jet s the cost much higher too, but their maintainence much easier, when it have paper jam occure, commonly replace paper pick up roller and paper stop roller, if you hear noise from back of the machine, 90% the fusing unit have problem, if the noise come from front, the problem almost in cartridge, the cartridge, here , I like to give you advise, use brand name cartridge better than generic one. because, too much manufacture, skill all difference as well as quality all difference, be careful, be smart !