CAPT TAXIING CAUTIONED TO HOLD SHORT OF XING RWY BY GND CTLR. AVOIDS RWY INCURSION.

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I WAS FLYING WITH A NEW FO WHO WAS HAVING HIS SHARE OF PROBLEMS. AFTER PUSHBACK I WAS EXPLAINING WHY A CERTAIN STEP IN OUR PROCS WAS ACCOMPLISHED IN THE MANNER WE DID IT. DURING A BREAK IN MY EXPLANATION; I TOLD HIM TO CALL FOR TAXI. HE DID AND WE WERE CLRED TO TAXI TO RWY 8. I CONTINUED TO ANSWER HIS QUESTIONS AS WE STARTED TO TAXI. GND CTL THEN CALLED AND TOLD US TO HOLD SHORT OF 17. LUCKILY; I WAS LISTENING BECAUSE MY FO NEVER HEARD IT. A VERY SHARP GND CTLR SAVED US FROM; AT BEST; A RWY INCURSION; AND; AT WORST; A COLLISION WITH A SMT WHO WAS TAKING OFF ON 17. YOU MAY ASK HOW I GOT ANYWHERE NEAR 17 WHILE I WAS TAXIING TO 8 AND THE ANSWER IS SIMPLE. MY HEAD WAS UP AND LOCKED. EVEN THOUGH I HAD LANDED ON 8 I WAS ON MY WAY TO THE E END OF THE ARPT. MY BEST GUESSES AS TO WHY I WAS DOING THIS ARE 1) WE MORE OFTEN THAN NOT TKOF W; 2) MY DEST WAS W AND I SUBCONSCIOUSLY WANTED TO TKOF THAT WAY; 3) I HONESTLY THOUGHT OUR INSTRUCTIONS WERE TO TAXI TO RWY 28 (EVEN THOUGH ABQ'S E/W RWY IS 8/26). IT HAD ALREADY BEEN A LONG DAY (WE HAD FLOWN 4 LEGS AND HAD 3 MORE TO GO); AND I WAS SO INTENT ON KEEPING MY FO ON THE STRAIGHT AND NARROW THAT I ALMOST SLID INTO THE DITCH. I REALLY DON'T KNOW WHAT I SHOULD HAVE DONE DIFFERENTLY OTHER THAN LISTEN UP. WITH QUICK TURNS AND A SCHEDULE TO KEEP THERE ISN'T ENOUGH TIME TO DEBRIEF AND REBRIEF EVERYTHING BTWN FLTS. MY FO WAS A GOOD PLT BUT NEW TO AIRLINE OPS AND AS SUCH WAS GENERALLY CLUELESS. AT CERTAIN CRITICAL TIMES; I FOUND MYSELF INSTRUCTING RATHER THAN RUNNING A COHESIVE CREW. I GUESS I NEED TO WATCH OUT FOR RECTAL CRANIAL INSERTION.