For example I feel that fast food and an unhealthy lifestyle leads chronic health problems that probably affects the economy not just monetarily.
Of course we can't just deny these people care, just promote a healthier lifestyle.
What are other things that we can change that will affect the economy in a positive way?
“A nation is born stoic, and dies epicurean” – Will Durant
I thought of this quote then I saw this thread, A stoic believes in going through hardships without complaints. An epicurean believed that pleasure is the greater good. In this case, stuffing on unhealthy foods because they are an easier option and shunning exercise and healthy foods because these are hard and less glamourous. So the quote implies that a nation is born of people willing to endure hardship, but fails as it's population places personal pleasure above everything else.
Besides health options, here are other obvious things that I also think that they may damage a country's economy
1. Corruption and greed
2. War - because it's costly and time-consuming
3. Intolerance - segregation of people according to race, religion, politics etc.
4. Unreasonable government policies that stifle investment and innovation
5. Lack of unity, national vision and social cohesion.