The best long term health decision you can take
Eating well is not only the best long term decision you can take but also short term. By a simple thing like abandoning suger you will feel a great change after 24-48 hours. Sometimes the change is so dramatic that you will feel "sick" when the substance is leaving your body.
Eating sugar is a great example of not what to do. But what shall we do? The best long term solution is to change the lifestyle from fast food culture to unprocessed superfoods of many kinds.