Occasionally the Internet delivers and gives us something decent other than videos of cats playing keyboards.
Flexbox is one of the newest and potentially most useful parts of CSS3 in a very long time. Support amongst browsers is fairly decent and while it is not really that new, being able to use it is.
This cheatsheet shows some nice easy to understand and follow, examples of how to use Flexbox. While the cheatsheet does not explain all of the great uses of Flexbox, it will help you understand how to use it.