Google Guide is the place to go if you are ever wondering if you can do x in any of its search engines. It will walk you through major Google operators, minor Google operators, and obscure Google operators so you can bring your search to the next level.

If you want to track important Google product updates, Google Inside Search is the place to start.

A guide from the Google search engineers themselves. This web site contains search tips, videos, and a link to their ever-popular Power Searching with Google MOOC.

This covers the entirety of Google. Google employees blog here about Google products, search technology, and information culture.

Gmail's filters allow you to manage the flow of incoming messages. Using filters, you can automatically label, archive, delete, star, or forward your mail, even keep it out of Spam.

This will NOT work for EliApps, but if you are curious about how to filter your email using address dots, this is the place to go for a tutorial. You can use dots in your email to create better search filters and rules for where things go when they are sent to you.