I finish my manuscript.
An agent answers my query.
I sign with an agent.
A publisher asks for my full.
I get a contract.
X amount of copies of my book sell.
I hit the Bestseller List.
I get asked to speak as a keynote presenter.

Honestly, do I need to go on? Because I could. The point is that if your happiness, or feeling of success, or fill-in-the-blank emotion depends upon reaching milestone after milestone, you'll NEVER be content. Why? Because that's following your agenda. What if God's agenda is different from yours?

This applies not only to writing, but pretty much everything in your life. Here's a bone for you to chew on for awhile...

"Only let each person lead the life that the Lord has assigned to him, and to which God has called him."