Foresight can be a great asset. Understanding the manner by which problems arise helps you take steps to prevent said problems. Often, preventing problems of the future (benefit) does require extra effort (cost) at the present. But it is well worth it because the effort required to deal with a problem if, or when, it crops up is typically much greater than the initial prevention requirements. So keep the future on your mind. Avoid yourself great expense and especially great suffering.
The most obvious application for this is with your own wellbeing. Everything you do every single day plays a role in this. Unfortunately, it is something that many of us need to improve upon.
What are some other places to apply this concept? And what are ways to fight impulses of the present that sabotage the prevention of future problems?