PLT OF AN SMA SEL LANDED ON TXWY.

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I WAS A FEW MINS LATE; BEGAN DSCNT FROM 5500 FT TO 1300 FT LATE. WAS NERVOUS ABOUT 'GETTING IT RIGHT.' UNHAPPY ABOUT MOVING TO NEW HOUSE AT MY WIFE'S INSISTENCE. WORRIED ABOUT VARIETY OF ACFT AT UNCTLED FIELD. IN RECENTLY PURCHASED ACFT PLACARDED AGAINST SLIPS LONGER THAN 30 SECONDS. GETTING USED TO NEW GRAPHIC ENG MONITOR; AND WORRIED ABOUT RAPID COOLING OF ENG. TXWY WAS VERY WIDE; BUT LOOKED ONLY SO AT STARTING END AND FOR OTHER PLANES IN AIR. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED THAT HE WAS OPERATING A BEECHCRAFT 24R DURING THIS INCIDENT. HE DID NOT REALIZE THAT HE HAD LANDED ON A TXWY UNTIL ON ROLLOUT. HE WAS APCHED BY A STATE POLICE PLT CONCERNED ABOUT HIS LNDG; WHO THEN INFORMED THE ARPT MGR WHO ALSO DISCUSSED THIS MATTER WITH THE RPTR. THERE WERE NO TFC CONFLICTIONS SINCE THERE WERE NO ACFT IN EITHER THE TFC PATTERN OR ON THE TXWY. HE DID CALL FOR AN ARPT ADVISORY ON THE CTAF WITH NO RESPONSE. HE MADE A LONG R BASE TO WHAT HE THOUGHT WAS RWY 23; WHICH WAS REALLY TXWY H.