You'll increase the longevity of your compact fridge if you keep it out of your garage, away from direct sunlight, or so that it isn't near heat vents. In doing so, you'll help the compressor from working too hard. Instead, place it in a location where the climate is controlled like a basement or well-ventilated room. It's also critical that you keep the coils vacuumed to ensure it doesn't overheat from dust and dirt accumulation.