Sometimes, the best way to think of ideas for an essay is to start with an example. One good example can give you enough ideas for a full paragraph.
Look at the following question:
Should governments make decisions about people's lifestyle, or should people make their own decisions?
This question seems difficult, but if you take "smoking" as an example of a lifestyle choice, it becomes a lot easier. Here's my paragraph:
In some cases, governments can help people to make better lifestyle choices. In the UK, for example, smoking is now banned in all workplaces, and it is even prohibited for people to smoke in restaurants, bars and pubs. As a result, many people who used to smoke socially have now given up. At the same time, the government has ensured that cigarette prices keep going up, and there have been several campaigns to highlight the health risks of smoking. These measures have also helped to reduce the number of smokers in this country.