This blog explains the importance of building a source of residual income as a way to prepare for a recession. It discusses various ways to create residual income, such as renting out property, investing in dividend-paying stocks, building an online business, investing in a franchise, and building a portfolio of rental properties. It highlights the key to building residual income, which is to start early, be consistent, and invest smartly. The blog concludes by emphasizing how having a source of residual income can provide a safety net to fall back on during a recession.