Update all of your passwords to something that your soon-to-be-ex will not be able to guess.
It is not uncommon for married couples to share (formally or informally) an email address. As you move from a joint identity to a separate one, it's important for you to be able to use email freely. This is often a cost-effective method of communicating with your attorney.
Credit Karma is a free resource you can use to monitor your credit report. It also allows you to monitor your credit score. As you review your credit report, make sure there are no surprises. If there is anything that should not be in your report, you can dispute it with the creditor.
If you only have joint bank and/or credit card accounts, it is important that you...