You need to halt the default text in the channel.
Code:
on *:text:*:#: {
  ; first halt the default text in the channel.
  haltdef

 ; now echo to the channel what we want to see.
 echo -mt $nick >> $1-
}

Untested, just added it as an example, if you want to halt your own text, take a look at: /help on input

if ($me != tired) { return } | else { echo -a Get a pot of coffee now $+($me,.) }