Answer:
3. Use a budget to live within your means and build savings
This is always the best option to prevent financial problems like a foreclosure. Budgeting your expenses according to your income, and building savings should prevent any person from defaulting on his or her mortgage payments.
However, in less ideal situations, if a foreclosure can be reasonably projected in the future, the best option to prevent it is to 2. Refinance as soon as possible