Noob Question

You can block individual sites by add them to the hosts file with the loopback ip address.

e.g. a site added as 127.0.0.1 www.badsite.com will loop back to your Mac and not display the site

Instructions here for editing the hosts file.

It means using terminal but the stet-by-step guide is straightforward enough. Though, as with all things terminal, read the info and only proceed if your happy to do so.

Well, not myself perse, but other people on other accounts. And this will work for all accounts on the computer?

Yes it will.

How can I reset my Keychain password, I forgot it?

When I press "reset my default keychain" it says, "the specified keychain could not be found". I think I already have some major issues...