1. Never set a release date until you have gotten the final copy approved by KDP or CreateSpace. If not, you will count the hours, minutes, seconds, hoping to get a good copy uploaded and approved by the date.
2. Forget sleeping on the night before release. I was at my computer at 2 am worrying about a wrong last name in the description.
3. There will be mistakes in your manuscript. A friend shared with me how I had used two wrong words in mine two days after release. Ugh. I wanted to die. I had gotten my book professionally edited but all the reviewers and myself had missed those words. Perfection is not the goal. You might never get it perfect.
4. Learn formatting before you play with the sites' programs. I taught myself a crash course in indentation too late. I still have not figured out how to flush even the margins on a paper version.
5. Buy a hard proof copy. I bought four. I ran out of time for the final and fifth and just crossed my fingers and hoped for the best.
6. Realize not everyone will love your book. Already one friend told me she bought it but was afraid of the content as she is sensitive to it. That's ok. Brown shoes and black shoes.
7. I thought when I updated my book on Amazon Kindle, my readers would get updates too--not happening. So learn to be ok with your original draft, do the changes and upload another.
8. Don't check your sales stats every hour, They will play with your emotions and you don't need that on top of your crashing self-confidence. Just let it go.
9. Be happy you did it. Even if only for a few minutes each day. Many people won't ever publish a book in their lifetime.
10. Ask your readers to post reviews as quickly as they tell you they liked your book. It can't hurt.
This journey has just begun for me. I don't know if I will ever do it again but glad I gave it a shot. I do know that the stress is the same for traditional and self-publishing when it comes to hoping people like your story. In the end, story trumps everything.