As far as a healthy diet goes, I'm always trying (and often failing) to improve my eating habits - it's really difficult to cut down on carbs these days.
You're telling me! Carbs are my favorite & have been the hardest thing for me to ever cut out when dieting; let alone when going keto!
I'm a firm believer that the best and easiest way to improve your diet is by slowly introducing good habits rather than depriving ourselves of the wondrous variety of food. The number 1 good habit is to drink large amounts of water (2 litres per day) - this alone is a great start without making any other changes to your diet.
These are definitely great points :) You can never drink too much water! And yeah I completely, 100% agree that a good way of habitualizing something (be it cutting out something from your life or introducing a new, positive aspect into it) is by slowly tapering it in/out. Coffee intake, for example, shouldn't be cut out in a "cold turkey" approach, but rather, lowered in gradual amounts over a steady period of time.
Too much of anything becomes bad , that includes water.
https://www.webmd.com/fitness-exercise/features/water-intoxication#1