Apply for credit cards in your own name. If possible, obtain credit cards with checkwriting privileges. Discuss divorce with your spouse as calmly as possible. Find out what his hot buttons are, and where he is willing to make concessions. Find a good therapist or support group to help you through the months ahead.
Divorce is too traumatic to go through alone.
Take your time and don't rush matters. Planning a divorce is best done deliberately and slowly. This is your chance for a new beginning.