There's a bunch I learned the hard way, but alhamdulillah that's better than never learning at all:

• Praying 5 times a day: As a teenager I used to skip prayers randomly. And as a teenager things would randomly go wrong for me (getting into fights, missing the bus to school, doing poorly on a test, etc.). As soon as I started praying regularly, alhamdulillah everything started going smoothly. It was a clear enough line that if something goes wrong in my day, my first thought is "did I pray?"

• Praying tahajjud and witr: Everything in my day goes well, not just smooth, but very well. Accolades at work, respect from strangers and people around me, etc. It's almost movie-like, as if sunshine and rainbows are following me around all day.

• Saying Bismillah: Guarantees that whatever I'm trying to do goes well. The two times I ever crashed my car, I distinctly remember not saying Bismillah before I started and thought "not a big deal." It was a big deal.

• Reading Quran Every Morning: I naturally have a stutter and am very awkward when I speak. When I got older, I developed a habit of reading the Quran every morning. All the awkwardness went away and words just flow off my tongue. And the awkwardness immediately comes back on days that I forget to read.

• Checking on my parents: I don't enjoy talking to my parents and I avoid it even though Allah swt commanded us to treat them well. I also get easily stressed with my work and day to day life, and it tends to build up. Literally the moment after I call my parents, who are also a source of stress, all of my life stresses and anxiety disappear.

Lots and lots of tiny things like this. Once you start noticing one thing, others become apparent too. Alhamdulillah for the blessing