Template:Message

Usage

{{message
  | bgcolor = background color
  | border-color = border color
  | color = text color
  | linkcolor = link color (for "new message" link)
  | extra-style = extra styles, like -moz-border-radius etc...
  | width = box width
}}

All parameters are optional, and default to the appearance shown above.

Just put {{message}} at the top of your talk page or user page. This will create the "Please leave a new message" link as shown above. You can use subst: if you want to, but then you won't benefit from updates to this template.