The Emotions Chart
This is an "emotions chart". It's really useful when you're struggling to identify - or communicate - the emotions you're having, and it's simple to use.
The emotion words are written on either side, and there's a scale in the middle. So you can easily say "I'm feeling mad at you at a 5, and need space at a 7 right now."
The tool was originally designed for children (this specific iteration was created by my ex-wife, Aubrey), particularly those on the autism spectrum. However, I've found it's really useful for anybody who is struggling with identifying how they're feeling... and in our culture, that means just about everyone.
You can click the image to get an embiggened version.