I delivered some training sessions at my school including a Google Hacks workshop. During this workshop I helped people hack Google Forms and Google Slides, and also taught them how to take control of their Gmail inbox (mine is now pretty much empty for the first time ever! Also I have color coded labels and filters and all sorts of magic making it work well for me).
Here's the presentation, Google Hacks:
On every slide it gives step by step directions for completing the different hacks. I also have linked video tutorials for every tip too.