The answer is obvious - it's just practice. The secret is to not stop, when you make a mistake, don't stop and fix it because that's not how music works, the rest of the band won't stop. That's why I recommend having a reading partner - someone to practice with.
Get the William leavitt books and read daily - the more you do it, the better you'll get, you just need to take it seriously. Outside of that, Bach violin pieces and the inventions are great too.