For this, DINK couples should start by setting clear retirement goals basis their financial situation, like what they earn, own and owe. It is important to make a realistic budget that matches their goals and income, and to save money regularly. Following a disciplined approach, they can prioritize investing for retirement over unnecessary spending, using methods like Systematic Investment Plans (SIPs) and gradually invest more using Top-ups as their income increases. Also, upon receiving, extra money like bonuses or business profits, they can consider adding it to their retirement savings. After retirement, they can use tools like Systematic Withdrawal Plans (SWPs) to ensure consistent cash flow, allowing them to enjoy the sunset years of their life.