We have sourced the web for some of the best email sales tips across multiple sites. Here is what we have found to be of most value.
This article by Sales Hacker is genius in its simplicity and effectiveness.
AIDA in Emails (Attention, Interest, Desire, & Action)
This post by Make it Happen is similar to the one above but with a few changes. This is useful when reaching out to different individuals
These didn't make the list but are worth a quick read:
Do "Just Checking In" emails actually work? by Outreach
Don't start an email with pleasantries. State the value first because that is all the contact will see when they look at your email on their phone - Make it Happen
Workflow Templates - Sales Hacker
Call to Action Examples - Sales Hacker