The two main tricks I'd recommend to not take potato-quality pictures are lighting and framing/composing. Asking yourself a few questions about the lighting situation (which way is the light coming from? Is my foreground darker than my background? should I take the shot from the other direction, if possible?) will help a good bit to start.
For a quick idea on composing, think about the rule of thirds and the golden ratio
Just these two concepts will get you started taking much better photos than most unskilled photographers, and at least I find it doesn't take me too much time to give a second or two thought to them. I'd encourage you to turn on a rule of thirds layer on your camera, it'll start to make it really easy to do some quick composition.
I'm nodding in agreement here. For composing I would suggest people also look into cropping the photos before sharing them to get to the golden ratio or rule of thirds. It's usually a really quick and simple edit to make and it makes a huge difference.
I would also add a third useful concept: find ways to hold the camera still when taking the photo. This can be by using a delay timer, or use the volume button instead of the on screen button, or just holding the phone differently.
For a quick idea on composing, think about the rule of thirds and the golden ratio
https://en.wikipedia.org/wiki/Rule_of_thirds https://www.apogeephoto.com/how-to-use-the-golden-ratio-to-i...
Just these two concepts will get you started taking much better photos than most unskilled photographers, and at least I find it doesn't take me too much time to give a second or two thought to them. I'd encourage you to turn on a rule of thirds layer on your camera, it'll start to make it really easy to do some quick composition.