Have you separated your bank accounts and credit cards yet? If not, this is what you might want to do. It's a good first step. Even though she is currently financially dependent on you (since she doesn't have a job), this will encourage her to get one more quickly. It also makes the separation more solid which will help later on if you file for D. I think you can use it as a date of separation and will pay less alimony.
There is no arriving, ever. It is all a continual becoming.