I'll try

sub start_working_day
{
    if ($me->is_sick) {
        return undef;
        }
    elsif ($wheather->raining) {
        $travel->use_car;
        }
    else {
        $travel->use_bike;
        }
    $travel->go;
    $work->do;
    return;
    }
[download]

As you can see in this snippet, there are several expressions that control the start of a working day. After the if/elsif/else the real work starts, as it is the same for all situations: it is common code. Or is it? No it is not! When I am ill, the common code is never executed, so there is no reason whatsoever to have an else block: there is no need for an alternative, as there is no intent to run that common code.

My stance is that a function or method should be written in a way that the most likely codepath is the easiest to follow with the eye. Exceptions should exit early.

sub start_working_day
{
    $me->is_sick and return undef;

    if ($wheather->raining) {
        $travel->use_car;
        }
    else {
        $travel->use_bike;
        }
    $travel->go;
    $work->do;
    return;
    }
[download]

As you can now deduce, the code after the if/else is run for all cases of the decision tree, and hence reflects the thinking logic.

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