Much of what people mislabel as 'misbehaviour' in preschoolers has more to do with emotional, physical, and cognitive development and age-appropriate behaviour. Young children need teaching, guidance, and LOVE (which is a good definition of Positive Discipline.
Positive Discipline has nothing do with punishment and everything to do with teaching valuable social and life skills. Discipline means to 'educate' It means you must decide as a parent what to do and then follow through with kindness and firmness. You must be confident and consistent.
This is how you will build a respectful loving relationship with your child.
In order to do this thing called Positive Discipline... you may want to look at Jane Nelsen's building blocks of Positive Discipline:
1. Mutual respect
2. Understanding the belief behind the behaviour
3. Effective communication skills
4. Understand your child's world
5. Discipline that teaches
6. Focusing on solutions instead of punishment
8. Children do better when they feel better.
Think about what each of these sections means to you and your family. Take time to write down your concerns with your own child and really focus on solutions and ideas on what you can do to affect the situations.
Keep an eye out for further details in the future on each of these ideas.