Diet is more than what you eat.
Whenever you see me use the word "diet" I refer to the noun, meaning "the kinds of food that a person, animal, or community habitually eats.".
As opposed to the verb, "restrict oneself to small amounts or special kinds of food in order to lose weight.".
If we refer to the first definition, your diet comprises what you usually eat. But for me, this term can be extended to anything you consume.
The alternative form of consumption I want to focus on is media.
TV, radio, newspapers/news apps, books, music, podcasts, social media, blog posts and other forms of internet consumption, video games...
Look at how you consume and monitor these as part of your diet.
The music you listen to will influence your mood, your emotions, and your actions - there's a reason people play upbeat music to get themselves going, and lo-fi music to unwind...
Your choice of television, especially should you watch the news, is something you should take great care over.
As Barrack Obama states in an interview with David Letterman, "If you watch Fox News, you are living on a different planet than you are if you listen to NPR.".
As someone that hated to read as a child, I now stand firm that books and podcasts can be the greatest opportunity to build knowledge - and those that you decide to dive into are a part of your "diet".
With regards to social media, who you choose to follow, and therefore consume, are a part of your "diet". Meaning what type of content you want to be consuming (as part of your "diet") is in your hands.
Consumption spans far beyond food and drink. Pick carefully, and think about how what you consume is influencing your thoughts and actions.