Re: worrying that I had clicked on a bad link from Google
1) Do not have the address bar double up as a search bar.
2) Do not have the browser suggest URLs from the browser history - bookmarks/favourites only.
Put the sites you do want to use on a regular basis in your favourites/bookmarks.
With the browser set like that, typing HSBC into the address bar will always result in the correct domain coming up.