Serial.println Sensor Value and text in one line
You just do two Serial prints:

Serial.print("POT value ");
Serial.println(sensorValue);


The .print prints without moving to a new line, the .println moves to a new line.

If you want to be more fancy and don't mind the processing and memory overhead, you can use snprintf to format the string:

char temp[15];
snprintf(temp, 15, "POT value %4d", sensorValue);
Serial.println(temp);


You can read more about sprintf and formatting here: 


http://www.cplusplus.com/reference/cstdio/snprintf/ (function parameters)
http://www.cplusplus.com/reference/cstdio/printf/ (formatting options)


Note that there is no floating point support in the standard library for the Arduino - so you can't use %f etc.