5 Practice Tips
Know what to practice. Playing something from beginning to end is (usually) a waste of practice time. Zero in on areas that consistently cause you problems and begin there instead. Most of the time, it's usually only a few beats or a few measures.
Identify what is causing the issue. Is there confusion about the pitch or a shift? Is it a rhythmic problem? Is it a bowing/articulation problem? Without knowing exactly what is causing the problem, you don't have much hope of solving it efficiently.
Know your key signatures and where your half steps and whole steps occur.
Look for patterns. Rhythmic patterns, bowing patterns, pitch relationships/patterns.
Keep track of the pulse, even if you must play painfully slowly, you do yourself no favors by playing out of rhythm.