When you know your marriage is over, there isn't any reason to make things more difficult than they have to be. Leaving the marriage and filing for divorce set up a clear path for what you plan on doing. There are many things that you can do to try to have an amicable split.
As you begin to work through the process, you might find that things aren't as easy as you thought. You might need to grieve the end of your marriage, even if you were the one who called it quits. You may realize that you feel guilty about being the one who ended things.
It is usually best to try to keep things cordial with your ex, but this doesn't mean that you have to remain best of friends. Even if matters get contentious as you work through property division and child custody matters, you should remain respectful.
Some people expect that the divorce will automatically turn into a battle that is worthy of War of the Roses, but this isn't always how things work. Instead, you and your ex can make a concerted effort to keep things on track and make decisions together. Remaining nice can help to make the future better, especially if you have children to raise together.
Ultimately, your divorce is something you have to decide how to handle. As you make each decision, think about how it will affect your future so that you are setting yourself up for success down the road. Your divorce settlement can get you started on this path if you handle it properly.