package FooBar;

## Always used:
use strict;
use warnings;

## Other modules:
require Some::OO::Module;
use Some::Function::Module qw( Func1 Func2 );

## Setup of this module:
use base 'Quux';
use vars qw( $VERSION @EXPORT_OK );
$VERSION= 1.001;
@EXPORT_OK= qw( ... );

## Globals:
use vars qw( $Master );
$Master= ...;

use constant _IdNo => 0;
use constant _Name => 1;
use constant _Pos  => 2; # Gee, we need "use enum" (: