The easiest way to maintain an aquarium is with some type of controller. Nowadays, you want it web-ready, providing information up to the minute, and it should text you as soon as something is out of range.
For the last decade, I've been using Neptune System's Aquacontroller. First I had the AC II, then later upgraded to the AC 3. Near the end of 2011, I gifted myself the Apex controller, the latest available version at that time. The Apex has been around for a couple of years, and many of my friends swear by it.
The controller turns the lights on and off, as well as the heaters and fans (or chiller, if you have one). If the tank runs too hot, the controller can shut off the lights to stop adding further heat to the water. And if it has been set up with a battery backup, it can notify you via text or email if the power goes out.