Google has run a short MOOC (Massively Open Online Course) a couple of times. It includes short videos and short self-tests, all about searching Google. If you want to improve your Google skills, it is worth a look. The web address is http://www.powersearchingwithgoogle.com/ and this is the first, introductory, video.
There are lots of tips, but it is good to complement those materials with extra tips (and a more critical perspective) e.g. from Karen Blakeman: