Things that damage the economy indirectly.
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?
Talking about the economy as whole and seeing this thread in economics section I would say something related to Economics. So basically we all know all our lives we have been listening save save save. While saving is good at individual level it is drastic for economy as a whole. The amount savings which goes to your piggybank instead of bank is the money permanently blocked from the economy. This is out of circulation until you spend or invest it. This makes the aggregate supply in the economy weak there by leading to inflation over time. Even investment in jewelry is considered such leakage from supply. So it's not quite obvious thing affecting economy as a whole.