open (file.....)
while (<FILE>) {
   my $skip_next = 0;

   if /blah/ {
       $skip_next = 1;
   }

   elsif ( ... something else ... ) {
   }

   elsif ( ... third condition ... ) {
       $skip_next = 1;
   }

   ....

   $_ = <FILE> if $skip_next;
} # while reading through the file