Sometimes I find that I accidentally click "Never for this Website" when Safari offers to remember a username and password. More commonly, friends and family use my mac and go on the same websites i do, then click it without thinking about my saved passwords.

Once it has been clicked, Safari refuses to remember any passwords for that website, which can get to be a lot of hassle, especially if you visit the site daily. Luckily there is an easy fix for this, which lies in Keychain Access.

Firstly, open up Keychain Access (Applications/Utilities) and look for the site address in the "login" keychain. In the list you will see an entry that looks something like this:

www.examplesite.com (Passwords not saved)

Just delete that item from the login keychain, and then restart Safari. The next time you enter your unsername and password on that site, Safari will prompt you to save it.