I'm sure every parent has days like this:

Your child has been a troublemaker all day. You are exhausted, and at your wits' end. It would be nice to just take a break, to have someone else take over for an hour - or a day. But you're alone and the partner is at work for another "X" hours. The weather is bad; you can't go to the playground or zoo.

You feel like screaming.

What would you do to keep sane? Let's hear some ideas.

Update:
"Taking a break" is what I'd do too, but sometimes it's not easy. My reference situation is a toddler -- too young to be "parked" in front of a TV, and too old to be placed in a crib. Lock him in his room? Doesn't feel right.