When leaving, it is important to try to take certain items with you. Beyond this, give an extra copy of papers and an extra set of clothing to a friend just in case you have to leave quickly.
MONEY: Even if you have never worked, you may legally be allowed to take 1/2 of the funds in the checking and savings accounts (check local laws to see if you live in a community property state). If you don't take any money from the accounts, your partner can legally take all money and/or close the account and you may not get your share until the court rules on it, if ever.
These items might be placed in one location, so that if you have to leave in a hurry, you can grab them quickly. If time permits, have copies made and hide them in a safe place so that the abuser will not become suspicious that the items have been moved. When I leave, I should have: