Five Keys to Good Discipline
9 & 10 Months
First, prevent situations where baby might do something you don't like. Move that canning jar to a higher shelf. Put a gate on the stairwell. Create a trouble-free environment!
Second, ignore behavior that is annoying but not harmful. If baby pulls everything out of your sock drawer, just take a deep breath and ignore it. If you pay too much attention, it teaches baby to do things like this to get attention.
Third, distract or redirect baby from things you don't want her to have or do. If she has your keys and you need them, don't just grab them; instead, interest her in some other toy or activity. It's easier to get a baby started on something else, than to take something away.
Fourth, reward baby with your loving attention when she plays nicely. Don't become a parent who only notices your child when he has done something wrong.
And lastly, give freedom within limits. Your baby needs freedom to explore, but she also needs limits. Babies kept in playpens for much of the day have too little freedom and are too limited. Baby needs freedom on the floor to explore. The basement stairs are too much freedom and too dangerous.
Source: Nebraska Extension NuFacts