I've generated over $75 million with email marketing and sent over 1 billion emails in my life.
Here's the 20 biggest mistakes I've made (so you don't have to):
1. Spamming discounts
There are so many more ways to sell that's not your typical discount:
-Product bundles
-BOGO
-Give them credit to your store
-Buy 1, Gift 1
-Giveaways
-Cashback
-VIP Programs
-Vouchers and coupons
-Joint promotions
-Contests
-Referral commissions