One of the most important benefits of living in a democracy is the fact that we are allowed to participate in government. People are allowed to voice their opinions and concerns and engage in the political process.
The answer to this question is personal, as it depends on what each person does to be engaged in politics. However, some examples would be writing letters to your representatives, voting if you are of legal age, or keeping up to date with news in politics.
There are several reasons why these approaches might be preferred. Voting is a very direct and simple way to make your opinion heard. Keeping up with the news is also relatively simple, as there are many sources you can consult. Finally, writing letters to your representatives allows you to have a more personal relationship with them.