I always before going to bed check my vote power, like you I think 100% is a waste, so try to get it to say 98% for when I wake up, that gives me time to find something to vote on, (usually a comment I received overnight), another nice feature of steemworld.org it lets you know when you will be back to full power.
Sorry for all of you commenters, I know I sound like a salesman, but it is a good tool.
That is a good way to make sure that we fully utilize our VP. I know have nice steemworld is and it nice that you are sharing it with other people.