Wipe your instrument down with a soft cloth after playing.
Loosen your bow after you are done practicing.
Do not over rosin your bow.
Keep your instrument in its' case if you are not playing it.
Keep your instrument in a safe place.
Keep your instrument away from vents, fans, or outside walls.
Never leave your instrument in the car.
Always keep a spare set of strings in case one pops.
Always handle your instrument with care.
Do not let anyone else play with your instrument.