There is a tip that was actually helping increase my sales and conversion
and it's " REALLY KNOW WHAT YOU TRYING TO SALE"
If you are a vendor, that's perfect.
But if you are not, purchased the product that you want to promote
is really good, you can learn, use it for yourself and because of that
you will understand what do you have, that would be much easier
with you write contents for your emails series,
and prepare the contents to send to your prospects.
The sale can make easy the most is when you giving away
free valuable contents that related to the products that you trying to sell.
This is my tip