On the whole, good advice. Nothing new. However; "[on reusing usernames] .. Your username and password combination is a lock, and your username is half of it,

On the whole, good advice. Nothing new. However; "[on reusing usernames] .. Your username and password combination is a lock, and your username is half of it, so obscure it." -- this bit is nonsense. This entire article could be replaced with "use a password manager".