From Matt Haughey, a guide to creating a QR code for your wifi network that visitors with mobile phones can scan to get immediate access without needing to enter your fiddly password.
He points to qifi.org as an easy tool for doing this, and I can confirm that it does what it says on the tin.
If you preemptively generate a QR code for your home network, imagine the confusion and intra-family strife you can avoid from trying to find the chit with the password, and then the resulting “no, that’s an L, not an I” and “not a bracket, a paren!”
