Here is a weakaura that will display an icon to remind you to drop one of the fire totems when none are up and you're in elemental or enhancement spec:
Code:
dKI)baGlQeZevfZLIy2I6MOQQBlYorP9c7MW(PcnmQK(nrdMkYWPQoifvhJQSqbwSGSCv8uPLrL65kMkLMmQmDsxg56cTrQO2mQQSDuLPrr57ubJevLgTk5ZO4KcQhRkNwPZRsDyv1FPWZOin8GfDrrhu3U4QlMHMq5q5GfvplddDGfvV9j0r)ACqJdzScE0zieGs8iHIALkLqf)enWcwpu(SmxQyfmo6uVwkZbfvLkLS3(ey9qxbp6mecqJcIhju0FuLOXHmIIvraACidvQuYE7tia9fhvMmUwocv3eXbf9IwMlfSM6gnl)CWIghY4L)ZGa0JmtWIMIzDHfku04qgJp9qi0XNEWIoRGjtG1dnfZ6cly9qayDJaOqrJdz8KPqFfbOV8FgyrNvWKj0YxZ5V5SqHIEiMvkS3(e6(Kc0FuLie6YH68EihDYkvkH6WYPxG1u3OIyYEwgg6mG1dLBh)8)o8tkqdlu6WV)Jmj8tkgtQpLZgoVhYO0)ScgRuPe6tkZCsheieuuEG1ZmpxHcaa
To use, download weakauras2 from:
http://www.curse.com/addons/wow/weakauras-2
Then type /wa, select import, and ctrl-v to paste the aura.