A collection of things I've learned that I think others might like to know, but aren't big enough to fill a whole page all their own.
In Firefox, you can right click the URL bar for many websites to add their search page. This can then be set as the default, or given a custom shortcut under Settings > Search > Search Shortcuts, so that by typing `@foobar<Tab>` in the navigation bar you can search that website. For example, I have search shortcuts for the following:
For sites this doesn't work on, there's an extension: