Some people are just not gifted with bra unlocking powers -- it's like they're held in place by evil magic forces. Here's one tip that will make it a lot easier: use your left hand.
Photo by Sean Murray
According to some folks on Reddit this one takes the cake. Due to the way most bra clasps are oriented, they're actually easier to remove with your left hand than your right, even if you're right-handed. So the next time you're fumbling around like an idiot, switch hands and see if that makes any difference.