CTLR WORKING IN TWR WITH ALL POS COMBINED FOR LUNCH PERIOD; BECAME VERY BUSY WITH TFC. A PA28 IN THE TFC PATTERN WAS CLRED FOR THE OPTION ON RWY 13. A SHORT TIME LATER; THE CTLR CLRS AN ACFT FOR TKOF ON RWY 8. THE PA28 PLT ON THE OPTION APPARENTLY SAW THE MISTAKE AND STOPPED ON THE RWY SHORT OF RWY 8.

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WE HAD JUST COMBINED POS FOR LUNCH BREAKS. THINGS WERE PRETTY ROUTINE; THEN SUDDENLY IT ALL HIT. DEPS; ARRS WITH BAD RADIOS; AND IFR DEPS WITH NO FLT PLANS. I HAD 1 ACFT (PA28) IN THE PATTERN. WHILE TRYING TO GET A FLT PLAN IN FOR ONE ACFT; I HAD A DEP DELAY FOR ANOTHER FROM ZNY. BASICALLY; NUMEROUS DISTRS! I DIDN'T HAVE TIME TO GO TO HEADSET TO SPLIT THE POS AURALLY (1 IN EAR; 1 ON SPEAKER). SUBSEQUENTLY; WHILE WORKING THROUGH THE BARRAGE; I CLRED AN ACFT FOR TKOF RWY 8; WITH THE CHEROKEE ON FINAL RWY 13 CLRED FOR THE OPTION. WHEN THE ACFT OFF RWY 8 WAS AIRBORNE; THE CHEROKEE ASKED ME IF I HAD NOT CLRED HIM FOR THE OPTION. IT WAS AT THIS TIME THAT I SAW THE PA28 ON RWY 13; HOLDING SHORT OF RWY 8. I ACKNOWLEDGED THE MISTAKE AND APOLOGIZED TO THE PA28. TO PREVENT A RECURRENCE; I WOULD CHANGE 3 THINGS IN THE SCENARIO: 1) I WOULDN'T ATTEMPT TO PUT THE FLT PLAN IN. 2) AS BUSY AS I WAS; I SHOULD'VE SUSPENDED THE PATTERN TFC FOR A WHILE. AND 3) I SHOULD'VE HAD MY HEADSET AT HAND. BUT ABOVE ALL OF THAT; I SHOULD'VE DONE A BETTER SCAN WHEN I CLRED THE ACFT FOR TKOF ON RWY 8.