sputter sputter run die

[VICSVX]

bout a week ago i was driving around and my car started to sputter and have rough idle...i thought it was running on fumes so i filled up at the gas station..it fires right up and i thought all was dandy. well the other i started it after driving 30 min and it had rough idle again so i gave it some gas and it smoothed out to normal. i drove back home and let it sit for awhile before i went to work and it would not start. it cranks over so its not the battery...any ideas? i tried it again today and did minor trouble shooting and looked at the forum but nothing popped out at me. injectors? fuel pump? spark plugs?