Why won't my 2001 Saturn won't start

Start with the easiest things first take off your battery connections to make sure they're clean and no corrosion make sure the battery has a proper charge try to jump start the car even if think it's not the battery cuz the battery might have enough power to run the dash lights Etc but not enough cold cranking power so it might be a little bit weak and then check all your connections Etc spark plug wires all that and then get back to us.