Strategic distress is the best advice I can give you for your Coachella cutoffs. It will make all the difference in the world. How to know if it's right? You've got to spot it. There's no easy guideline, nor is there a perfect fit for everyone. Cutoffs need to be distressed in a way that flatters the contours of your body and are sized perfectly to your proportions.
The best way to get a perfect pair of cutoffs is to distress them yourself.
1. Put on the pair of shorts (or pants, if that's what you're starting with).
2. Grab that scissors and start cutting.
3. Cheese grader, sand paper, bleach - distress it.
Never take your project off your body.
Unless of course you're burning and working with open flames...
If this is too much work, there are a few pairs that I recommend trying on pre-distressed. They are not cheap. Why? You should know this, you're the one not wanting to do the work!
If properly fitted, these dangerous distresses look incredible...go try 'em on...