As parents, you must show an equal amount of love and affection towards your children. Do not burden any of your children, including your first-born, with unrealistic expectations. Rather let them thrive at their own pace.
Raise responsible kids, but do not pressurize your kids with responsibilities. Give them the opportunity to grow on their own and most importantly, let them make mistakes and learn from them.
Spend quality time with each kid and understand their thought process. If in case one child feels left out, let them know you love all your children equally and display the same.
Never tolerate bossiness and bullying among kids. Nip the problem in the bud, before it leads to an unhealthy sibling relationship.