How can I “reset” an Arduino board?

Question

I\'ve uploaded a sketch to an Arduino Uno whose loop is something like this:

void loop(){
    Serial.println(\"Hello, World!\");
}

So, now,

Answer 1

1. Unplug Tx from the microcontroller
2. Insert USB cable
3. Wait until full load
4. Connect Rx with hardware
5. Compile empty sketch in prosses and unconnect tx (don't worry about the error)
6. Connect Rx with hardware
7. Compile empty sketch
8. Power off and connect Tx