Sometimes one small lifestyle change can improve your health vastly over time.
I know this from personal experience.
After changing a few areas of my life, I was able to improve my focus, concentration and patience with others.
For me, it was sleep. I used to stay up late—usually for no reason, just staring at my phone—and then would have to get up early for work the next day.
As you can imagine, I felt tired all the time. Something had to change. I got myself into a steady evening routine, which helped me get around eight hours of shut-eye each night.
I stopped looking at my phone an hour before bed and instead journaled for a few minutes. Reflecting on my day helped me relax and prepare for the next.
When you start with small habit changes, you'll find that it's much easier to stick to your goals and make new behaviors automatic. For example, rather than trying to overhaul your entire diet, just make one change at a time, like adding one extra green veggie a day.
As you succeed in accomplishing one new healthy habit, you'll be motivated to add more healthy behaviors and drop the habits that undermine your health and well-being.