Keeping in mind that doctors, business owners and real estate investors are most vulnerable to attacks on their assets, the goal for protection is to actively plan and plan ahead. Every six months, you should inventory every possible asset. Never be in the psychological position of just waiting for the future.
Be very careful with the written promises of contracts and make sure giving your word is done as the business rather than as a personal guarantee. Utilize multiple strategies based on your comfort zone and with the opinion of your financial and legal advisors.
Finally, explore any possible state and federal exemptions for assets. Asset protection planning is an ongoing process and one that should be done in conjunction with a knowledgeable attorney.