What to do if you don't know where your house is with minecraft?

Answer 1

If you are using a laptop, there isn't much you can do. If you are using a desktop, however, have not saved since you left your house, are able to get at the back of your computer, and your computer's power supply has a switch on it, you can flip the switch off then on again and then turn your computer back on. This forces you to lose any unsaved data, including anything you have done since you left your house, and you can then start over.

Once you have gotten back to your house, you should probably take some time to put up landmarks so that you can find it again next time you get lost.