While this may not be directly applicable to your situation, you may want to try some sort of "finite state machine". (Purists may say this is not a true fsm . . . )

$state = 'initial_state';
while ($state ne 'completed') {
   if ($state eq 'state1') {
       #do something
       $nextstate = 'another state';
   }
   if ($state eq 'state2') {
       # and so on
   }
   $state = $nextstate; # so we don't confuse our logic
}
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Sure, it is not oo in style, but it can be easier to maintain.