Saying no all the time isn't good for baby
If you find yourself saying, "No," all the time, perhaps you should change things in the places where she spends time. Move that glass vase to a higher shelf. Put safety latches on the kitchen and bathroom cupboards. Move the outdoor barbecue to a spot where she can't go. This will make life easier for you, and you won't have to discourage baby's curiosity so often.
Sometimes you have to say, "No," to a baby. That's OK. Just don't overdo it. Besides, it's easier to change your living room than to stop your child's curiosity.
Before baby's first birthday, discipline is simple. It means teaching him limits through loving care and guidance. The key is reward. Many parents pay attention to their child's behavior only when it upsets them. This teaches a child that attention only comes when he does something bad.
Your attention is baby's best reward. Use it to encourage good, not bad, behavior! When baby plays nicely with the cat, makes sounds or tries to talk, reward her with a smile or talk to her. When she touches something you don't want her to have, distract her with a toy or point her toward something else. Ignore behavior that is annoying, but not harmful. Save "no's" for times when baby's safety is in danger.
Sometimes baby won't be happy with the decisions you make and will fuss. You may even be tempted to give in to baby. Keep in mind that limits are necessary for your child's safety and welfare. You can set limits while giving baby freedom to explore and grow.