All assets in a trust so it's protected from the State. Waiver of alimony and any ownership in business or real estate currently owned. Divorce, should it happen, must go through mediation or arbitration; not court. She doesn't agree, walk. Been there before, that is what I did and would do again if I did.
Females are a dime a dozen, rebuilding financial security; not always possible.
For retirement, once signing the certificate/license, open up a new Roth IRA, and leave your old one alone. If possible, try to continue to file as single and never transfer funds from the commingled account to your separate personal account.