I usually left mine on all night.
In the mornings, I like to turn the bathroom heater on to warm up the room before a shower. That outlet is on the same line as one of the outside lights, so it's been known to throw a breaker occasionally. So, I have to go out into the garage (it's attached, fortunately) and unplug one of the light strands before I can heat up the bathroom.
Oh, the modern day pains!!