THE FLC FAILED TO SET THE FLAPS AS PER THE BEFORE TKOF CHKLIST. THE FLC ABORTED AT PROMPTING OF THE TKOF CONFIGN WARNING. THE CREW DID A SINGLE ENG TAXI OUT AND WAS DISTRACTED BY TRYING TO START THE OTHER ENG WHILE ATTEMPTING TO COMPLY WITH THE COMPLICATED TAXI INSTRUCTIONS AT NIGHT.

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FLAPS WERE UP WHEN PWR WAS APPLIED FOR TKOF. TKOF INITIATION WAS DISCONTINUED PRIOR TO 15 KTS. DUE TO THE OBVIOUS OMISSION OF AN IMPORTANT CHKLIST ITEM; WE REQUESTED AND RECEIVED PERMISSION TO EXIT RWY. ONCE CLR OF RWY THE FLAPS WERE CONFIRMED PROPERLY SET AT 15 DEGS; FOLLOWED BY A THOROUGH TAXI AND BEFORE TKOF CHKLIST. THE TKOF WAS THEN ACCOMPLISHED FROM FULL LENGTH OF RWY 28 WITH REMAINDER OF FLT UNEVENTFUL. THIS WAS A MAJOR DEV FROM PRESCRIBED PROC DUE TO POOR CHKLIST DISCIPLINE. CONTRIBUTING FACTORS WERE FATIGUE AND CONFUSION. FATIGUE OCCURRED DUE TO A VERY STRESSFUL 4 DAY TRIP. THIS FLT WAS THE LAST LEG. THE TRIP WAS UNUSUAL IN THAT IT HAD SEVERAL DELAYS; ONE INFLT EMER REQUIRING AN ENG SHUTDOWN; AND OPS AT AN ARPT WITH ADVERSE WINTER WX CONDITIONS. THE DELAYS RESULTED IN CREW REST BEING CUT TO THE MINIMUM 8 HRS THE PRECEDING NIGHT. ALSO; THE TAXI CHKLIST WAS INTERRUPTED BY CONFUSION WITH COMPLEX TAXI INSTRUCTIONS. AS COPLT I DEVOTED TOO MUCH TIME TO THE TAXI RTE CLARIFICATION BECAUSE IT WAS NIGHT; CONFUSING AND INVOLVED XING AN ACTIVE RWY. ONCE THE RTE WAS VERIFIED; A TIME CRUNCH WAS FELT IN GETTING THE REMAINING ENG STARTED; CABIN NOTIFIED FOR TKOF AND THE REMAINDER OF CHKLIST ACCOMPLISHED. IT BECAME OBVIOUS THE REMAINDER OF CHKLIST WAS NOT PROPERLY ACCOMPLISHED. A VALUABLE LESSON WAS LEARNED; ALTHOUGH I WOULD RATHER HAVE NOT BLUNDERED. I THOUGHT I HAD VERY STRONG CHKLIST DISCIPLINE; HOWEVER I ALLOWED FATIGUE AND DISTR TO CHANGE MY PRIORITIES. FATIGUE AND DISTR NOW MEANS SLOW DOWN AND DO THE JOB RIGHT.