There’s a lot in this post. You could easily spend hours just going through the guide and downloading apps. Depending on how much privacy and security you need, it is time well spent.
If you just want some basic security, there’s plenty in here for you too, broken down into areas for email, web browsing, mobile devices, etc. Definitely bookmark this and refer to it when you decide to take the time to keep your stuff more secure.
And yeah, if you travel and are forced into using public wifi in various spots, then you definitely want to be on top of this stuff!