Every perl program starts with the same three lines of code. And this is just to get you started:
#!/usr/bin/perl -w
use strict;
use warnings;
Both use warnings and -w isn't needed, see: What's wrong with -w and $^W
Personally I prefer the shebang #!/usr/bin/env perl to say "use whatever perl is in my PATH" (see env), it'll also work better with e.g. perlbrew. Pointing to a specific perl binary makes sense if distributing a script to a system where you may not have control over the PATH (e.g. CGI scripts on hosting providers).
Update: I agree with Tux's reply: In the case of the shebang, TIMTOWTDI.
