Mage hand is the poor's man rogue.....you can use it to activate traps safely from 30 fts.
Also, is useful to open locks from a safe distance
But if you are planning of doing sneaky stuff with sleight of hands, you can do what real stage magicians do and set a distraction so the target are focussed on something that is not you.
Another trick you can do is to cast it BEFORE you need to use it. For example, in a crowded market, you cast it before entering, then, when you are mixed with the crowd direct the hand to use sleight of hand.