Best cold emailing practices!

I am trying to wrap my brain around what should an ideal cold email look like. Based on several tests, I have kind of zeroed in on the following, but still feel that I have miles to go. Would love to know the thoughts of the community: 1. Not more that 100 words 2. Max 1 link. 0 if you want a reply 3. Some chitchat at the beginning (not sure how much is too much. Would love to know thoughts) 4. Purpose explained - why it makes sense for the reader to consider my product/ service? 5. Low commitment CTA