Simple, but profound, and this concept of valuing incremental progress finds its way into all walks of life, beyond music. If you exercise, you will gain strength. If you clean, your environment will become more pleasant. If you communicate, your projects will go more smoothly. If you are thoughtful and loving in your relationships, they will strengthen. Even if all you do is fifteen minutes per day.
Developing the habit of regular practice on your instrument is the most important factor in how you will improve over time.

What practice means, though, varies between different people. This is a dangerous fact to drop, but I have known several world-class artists, playing in the world’s finest orchestras and with GRAMMY awards on their bookshelves, who have admitted to me that they seldom practice, in the traditional sense. No endless scales, no method books, no tedious drills. However, they do rehearse several times a week, if not every day.
So, they are getting the hours in a their instruments. And I suspect at the beginning of their careers, or as children, they did put in some time developing technique.
Building the initial momentum is the hardest part, so here are a few tips for getting the ball rolling.

1. Set a regular practice time, and defend it. If you know that every day you will practice at 7:30 AM, you will be there. Even if it’s just fifteen minutes, set a regular time. Hopefully, you can expand duration, as the habit develops. Expect that it will take two or three months to develop the habit. But at a point, if will feel stranger not to practice than to practice, like it feels weird for most of us to skip a day brushing our teeth. No, repeat after me: "Sorry, I can't do that then, I have to practice." That's how you defend this time, which is critical for your becoming a better musician and a happier person.
2. Play music, not just tedious drills. If it’s most enjoyable for you to play along with a recording, do that. As the saying goes, “Life is short; eat dessert first.” Ideally, you won’t only do that, but if that kind of lead is necessary to help you develop the habit of practice, go for it. And if you have an hour session, you’ll be able to get to the technique development dimensions too. Again, at first, the critical thing is to develop the habit of regular practice, perhaps more than specifically what you are practicing.
3. Vary how you spend your time. There are many things to learn about music besides simple technique: developing a sense of timing, memorizing tunes, understanding theory, creating tone, interpretation, listening to others, improvisation, and so on. You need it all, so don’t just practice the tedious dimensions of music making. Divide your practice into different dimensions: repertoire, technique, sight-reading, etc. Make every session interesting and fun—and relevant.
4. Think in terms of weeks, not days. Rather than practice arpeggios in all twelve keys every day, instead practice three or four a day, and then a different three or four the next day. In three or four days, you’ll have covered them all. This will relieve some tedium and give you more time to practice more inspiring dimensions of music-making.
5. Involve others. If you can schedule a weekly jam session with friends or family, you’ll be more motivated to practice. And if you can schedule a performance or a recording, that will similar be a good motivator.

Keep your practice sessions fun and empowering, and help yourself look forward to them. The purpose of music is joy and enrichment of the soul, so make sure that you’re getting that first. Then, use the momentum you get from following the love of it to pull your technique along. As the habit takes hold, you can fine-tune what you do in order to optimize the productivity of this important time.

Several times a week, a group of at-risk youth in Los Angeles reports to makeshift music rooms at Alexandria Elementary School near Koreatown for lessons in violin or cello or bass—and to Saturday ensemble programs where they learn to play with bands and orchestras. As the students study their instruments, researchers study the students’ brains.
The children, who devote at least five hours per week to their music, are participants in the award-winning non-profit Harmony Project, which provides free instruments and instruction to kids in underserved areas of the city if they promise to stay in school. The scientists, who hail from Northwestern University’s Auditory Neuroscience Laboratory, travel from Evanston, Illinois to a satellite lab in Hollywood for a few weeks each year to examine the impact of the music lessons on the children’s language and cognitive skills. What they are finding, according to Dr. Nina Kraus, a professor and neuroscientist at Northwestern and lead researcher of the study, is that music instruction not only improves children’s communication skills, attention, and memory, but that it may even close the academic gap between rich and poor students. Kraus reported these results in a National Endowment of the Arts-sponsored webinar in July.
When Plato said that music gives “wings to the mind,” he might have been onto something. Recent studies increasingly point to the power of music to shape the brain and boost its functioning.