Occasionally my 22-month-old daughter will lose her mind over something trivial or even inexplicable. During her tantrums, I have tried to pacify her with a book, a hug, a treat or other items. When none of those work, I have discovered that a change in scenery works best.
The next time your tot throws a fit, consider changing her environment. Take her for a walk around the block or a trip to the grocery. It helps to take wee minds off of whatever was bothering them. Pretty soon, they may forget what it was in the first place.