I believe that big changes starts with small behaviours. Actual work, however seemingly insignificant, makes a huge difference over time. I also recognize (mostly from my behaviour) that getting started and keeping started is often the hardest part.
Terry Crews, a former NFL linebacker and now television personality. He talks about how he used to “just go to the gym, even if it’s just to hang out and have a cappuccino.” He knew you can’t work out if you’re not there, and you won’t go there if you don’t enjoy yourself. So he went, every day, even if it was just to open his locker.
I think the lesson here is to deliberate choose a goal (play guitar, go to the gym, better dental hygiene, be a better leader, increase sales, grow a business), figure out the one minimal thing you need to do to get better at it, and do that one thing every day.