The Rules Of Rewards
Though rewards and bribes aren't inherently bad, You should use them wisely.  Children who expect a reward for every task that they complete are are bound to be frustrated when prizes don't appear, or think that unrewarded activities aren't worth doing.  Here are some guidelines to help you keep the treats under control.

    Praise is often reward enough.  Young children are highly
    motivated by a parent's recognition and approval.  Giving your
    child affection and generous verbal praise for cooperative
    behavior can go a long way toward encouraging more good deeds.

    Recognize exceptionally good deeds.  If your child has just spent
    an entire morning running errands with you with few complaints
    or upsets, a reward is appropriate.

    Use incentives, not bribes.  Bribes usually arise out of
    desperation.  You promise your toddler a new toy if she sits still
    at the restaurant, for example.  An incentive, on the other hand,
    marks consistent progress, encourages kids to change their habits
    for the long term, and is agreed upon in advance rather than
    negotiated in the moment.

    Use the right-size rewards.  If you're asking for your child's
    cooperation at bathtime, for example, an extra story when she's
    done is an appropriate prize.  Promising a new toy the next day is
    too far removed and unrelated to the evening activity.