Should I send this email

Work emails make me want to claw my eyes out. (Sometimes. Okay Okay. Most times.) Also meeting requests - well the meetings themselves actually. (It's hard to do work when you're too busy talking about doing work.) But they're a necessary evil. (And quite honestly I prefer emails to people actually coming by my desk and getting me out of my headphone-focus.) 

I've written before giving advice on sending emails  
Dos & Donts
The Art of Emailing
Follow Up Email Template

And then I came across this awesome flow chart that helps you better discern whether or not to hit send.

Study it. There's going to be a test later.