Placing a pressure plate in front of your door on the inside will take care of that problem. Then you'll only have to open it when you come back from wherever you've gone. It'll open and close on it's own when you leave, and close on it's own when you've entered the house.
Since it's on the inside, you don't have to worry about mobs opening your door unless they spawn inside your house.
I'm going to do this the next time I play. Seriously, thank you.
I'm going to do this the next time I play. Seriously, thank you.