I was self-employed and what has saved my life (and house) was Income Protection. So a section on Risk Mitigation is very useful. Also navigating the attitudes of the insurance companies - they would much rather not pay, than pay...so you've got to steel yourself for a long fight knowing what your rights and entitlements are etc.
Also, managing return to work - managing the side effects of the medications, managing expectations of clients, managing your expectations of yourself.
Be kind to yourself.
I have only told a few clients about my BC story...most I keep to myself because I don't want the head tilted sympathy and lack of belief about whether or not I can do what I did previously.
The value of networking and collaboration for support when you get back into it.